You have a stray ' character at the beginning of your <script> tag's 'src' value which is preventing the 'juicebox.js' file from being loaded.
Change:

.. to:

I have now been able to take a look at your gallery and the configuration options it uses (although I do not have a Samsung S3 on which to test).

Is the audio icon's status always correct, though? When you load the gallery, does the audio icon in the button bar show the 'Click to play audio' status and does a single click (rather than a double-click) play the audio? It sounds like your stock Android browser does not support playAudioOnLoad (like iOS devices) but that the Audio Button is displaying and functioning correctly.
Try a difference browser (such as Chrome) to see if this makes a difference.
Also, try setting expandInNewPage="AUTO" or expandInNewPage="TRUE" (rather than expandInNewPage="FALSE") to expand the gallery on a new page (rather than within the embedding page) to see if this makes a difference.

Maybe this is due do with the fact that your audio tracks are approximately 7MB each and are taking longer to download over 3G. Does the gallery display OK over your 3G connection? If not, please see this FAQ for a solution.

I also notice that your gallery's Back Button icon is not visible.
The Back Button icon's color should be determined by the buttonBarIconColor but is overridden by the textColor (which in your gallery is fully transparent). Either change your gallery's textColor (so that it is not fully transparent) or remove this configuration option from your gallery's XML file and your gallery's Back Button icon should become visible.
(I have logged a bug report with the developers regarding this and it should hopefully be fixed in a future version.)

@wspollack

Thank you for your input. Any information which might help is appreciated.

@patrick7

With regard to my original suggestion of creating a gallery with JuiceboxBuilder-Pro and then doing the sorting dynamically via PHP when the gallery is displayed (rather than when it is created), here is an example which will display the images in the order in which they were taken (comparing the EXIF 'DateTimeOriginal' values for each image) from earliest to latest.

(1) In your gallery's embedding code, use a configUrl to point to a PHP file named 'sort.php':

<!--START JUICEBOX EMBED-->
<script src="jbcore/juicebox.js"></script>
<script>
    new juicebox({
    configUrl: "sort.php",
    containerId: "juicebox-container",
    galleryWidth: "100%",
    galleryHeight: "100%",
    backgroundColor: "#222222"
});
</script>
<div id="juicebox-container"></div>
<!--END JUICEBOX EMBED-->

(2) Create the PHP file named 'sort.php' with the following code:

<?php
header('Content-Type: application/xml');
$xml = simplexml_load_file('config.xml');
$arr = array();
foreach($xml->image as $img) {
    $arr[] = $img;
}
usort($arr, function($a, $b) {
    $a_exif_data = @exif_read_data($a->attributes()->imageURL);
    $b_exif_data = @exif_read_data($b->attributes()->imageURL);
    $a_exif_date = !empty($a_exif_data['DateTimeOriginal']) ? strtotime($a_exif_data['DateTimeOriginal']) : '';
    $b_exif_date = !empty($b_exif_data['DateTimeOriginal']) ? strtotime($b_exif_data['DateTimeOriginal']) : '';
    return $a_exif_date - $b_exif_date;
});
$dom_doc = new DOMDocument('1.0', 'UTF-8');
$dom_doc->formatOutput = true;
$settings_tag = $dom_doc->createElement('juiceboxgallery');
foreach ($xml->attributes() as $key=>$value) {
    $settings_tag->setAttribute($key, $value);
}
foreach($arr as $img) {
    $image_element = $dom_doc->createElement('image');
    foreach($img->attributes() as $key=>$value) {
        $image_element->setAttribute($key, $value);
    }
    $title_element = $dom_doc->createElement('title');
    $title_text = $dom_doc->createCDATASection($img->title);
    $title_element->appendChild($title_text);
    $image_element->appendChild($title_element);
    $caption_element = $dom_doc->createElement('caption');
    $caption_text = $dom_doc->createCDATASection($img->caption);
    $caption_element->appendChild($caption_text);
    $image_element->appendChild($caption_element);
    $settings_tag->appendChild($image_element);
}
$dom_doc->appendChild($settings_tag);
echo $dom_doc->saveXML();
?>

(3) Place the 'sort.php' file in your gallery folder (in the same directory as the gallery's 'config.xml' file).

This solution relies on the images in the gallery's 'images' folder having EXIF info.
Please note that JuiceboxBuilder-Pro strips EXIF info when resizing images so, if you are using JuiceboxBuilder-Pro to create your gallery, you may need to resize your images in an imaging program such as Adobe Photoshop (and ensure that the EXIF info is retained when saving them) before feeding them to JuiceboxBuilder-Pro and then deselect the 'Resize Images' checkbox (on the 'Images' tab) so that JuiceboxBuilder-Pro just copies the images (with EXIF info intact) into the gallery's 'images' folder.

I hope this helps.

Thank you for posting your suggestion in the Feature Requests thread. (It keeps all the suggestions together and ensures that they are not overlooked.)

The only sorting options available within the JuiceboxBuilder-Pro interface are 'By File Name', 'By File Date' and 'Reverse' (from the 'Images -> Sort' drop-down menu at the top) and the ability to drag and drop a thumbnail (or a Ctrl+Click or Shift+Click selection of thumbnails) into a new position on the 'Images' tab.
There are no other automated methods of sorting images within a  gallery.

It would be possible to sort image's dynamically using a server-side scripting language such as PHP (no matter what order the images actually are in the gallery's XML file) but it would likely involve a lot of work to create such a script and knowledge of PHP would be required.
You would load the PHP script using a configUrl in your gallery's embedding code.
The script would then read the gallery's own static XML file, store the image tag data in an array, sort the array into whatever order you require (assuming that the property that the sorting relies on is available within PHP) and then output a new XML file on-the-fly.
This would be further complicated by the need to ensure that all associated thumbURL, linkURL, linkTarget, <title> and <caption> entries are still attached to their respective images.
It might also not be quite as fast as loading a gallery with a static XML file (especially in a gallery with a large number of images) but it might be an avenue you wish to pursue further.

@aleckaram

Please post the URL to your gallery so that I can take a look.
Also, please let me know exactly which devices and browsers (and version numbers) you use.

Also, please bear in mind that playAudioOnLoad (the ability to start playing audio automatically when the gallery is loaded) is not supported on iOS devices.
(This is noted in the description of the playAudioOnLoad configuration option on the Config Options page.)

Thank you.

In the code you posted above, the showImageNumber="false" configuration option comes after the > character which closes the opening <juiceboxgallery> tag.
Change:

captionBackColor="rgba(0,0,0,0.1)">
showImageNumber="false"

... to:

captionBackColor="rgba(0,0,0,0.1)"
showImageNumber="false">

firstImageIndex is a Pro-only option (as you are aware).
The only other way to load a particular image in a gallery is to set enableDirectLinks="TRUE" (in JuiceboxBuilder-Pro's 'Customize -> General' section) and then use a # in the URL. For example:
http://www.example.com/gallery/index.html#7 would load the gallery and initially display the seventh image.
However, enableDirectLinks is also a Pro-only configuration option.

It sounds like what you want to do is embed your galleries in your existing web pages alongside your other content (essentially replacing your static images with galleries), rather than have the galleries displayed on pages of their own. If so then you should follow either the standard embedding instructions here or the baseUrl embedding instructions here. Using the baseUrl method of embedding allows you to keep each gallery in its own folder (and you would upload the entire gallery folders to your web server). I would recommend this method if you plan to embed multiple galleries as it helps to keep things organized on your web server.
(Embedding Juicebox-Lite galleries is exactly the same as embedding Juicebox-Pro galleries).

No. Please see this FAQ:
Can I try a trial version of Juicebox-Pro?

Yes. If you are creating your gallery with JuiceboxBuilder-Lite v1.4.2, the Gallery Title (from the 'Customize' tab) will be displayed in the browser's tab.
Otherwise, you can edit the gallery's HTML index page in a plain text editor and change the contents of the <title> tag in the <head> section.

Just to clarify, maximizing the browser will not, by itself, cause a gallery to go fullscreen (or full browser).
You will need to either click on a gallery's Splash Page or Expand Button to expand the gallery.

I do not know how SlideShowPro generates a fullscreen effect in Mobile Safari.
According to the website I linked to above, Mobile Safari does not support the Fullscreen API.
As far as I am aware, the only way to hide the Mobile Safari toolbars on an iPad is to add the web page to the home screen (as in my previous post).

Try using another browser such as Chrome to see what difference this makes.

This forum thread regarding hiding the toolbars in Mobile Safari may be of interest (although it is not directly related to the iPad).

Mobile Safari does not support the Fullscreen API (which is used to expand a gallery fullscreen rather than just full browser). (A list of browsers which currently support the Fullscreen API can be seen here.)
On an iPhone (for example), the size of the browser window cannot be changed so the gallery is only actually expanding within the browser (but looks to be going fullscreen due to the browser window filling the screen).
If you maximize your browser window on your iPad and expand your gallery, it should look similar to the way it displays on an iPhone.

Also, you could try saving a bookmark of your gallery's web page to your home screen (load the web page in Mobile Safari, click the arrow icon on your browser's toolbar and select 'Add to Home Screen'). A new bookmark icon to your gallery's web page will be created on your Home Screen and clicking the icon should run the gallery as fullscreen as possible.

Your gallery's code and files remain constant and in an ideal world, everyone should be able to see exactly the same thing when they view your web page.
If certain users are unable to see certain images in your gallery (in an unpredictable manner), then it sounds like their browsers may be timing out before being able to complete the loading of an image. The variables in the equation are the web server the gallery is hosted on, the user's internet connection and the route that the data takes to get from one place to another.
The only thing you may have any control over in such a scenario is your own web server so perhaps you could increase the server timeout values to see if this helps. Your web host might be able to help you with this if it is at all possible.
Also, try setting imagePreloading="NEXT" (rather than PAGE) to reduce the load on the user's browser when the gallery is initially loaded. (You may already be using this value but I cannot currently log in to see your galleries and check.)

As you have noticed, this will not work when you use a baseUrl.
The linkURLs were designed to be genuine URLs and Juicebox was not designed to run JavaScript instead.
This takes advantage of the ability to run Javascript from a hyperlink as follows:

<a href="javascript: run_function();">Content</a>

If you use a baseUrl, Juicebox will prepend it to the 'href' attribute in the dynamically generated hyperlink resulting in a broken JavaScript call.
There is nothing that can be done to circumvent this behavior. The only way it will work is if you do not use a baseUrl.