Before posting my last reply, I checked that your gallery was located here: http://www.miaforino.com/3month/
... and going to that location in a browser displayed the gallery on its own page OK.
Now, this does not happen so it looks like you might have been moving files around on your web server.
All you should need to do to embed your gallery in a web page is upload a complete gallery folder (not just the contents) to your web server and follow the baseUrl embedding instructions as documented here.
It does not matter where on your web server you upload your gallery folder to as long as you know where it is and that the two paths in the embedding code (the path to the 'juicebox.js' file and the baseUrl itself) are correct.

Juicebox-Pro does not support the Flick Photo Id parameter. Currently, to be able to input a Flickr Photo Id and have your gallery display the corresponding image, you would somehow have to map the Flickr Photo Ids to the Juicebox-Pro Direct Linking index numbers.

There is no configuration option to change the background color of the Back Button but this can be achieved by changing the background-color CSS rule for a.jb-go-back-icon on line 485 of the 'jbcore/classic/theme.css' file, e.g.:

background-color: rgba(0, 0, 0, .5);

The last parameter of the 'rgba' value (the alpha channel) is the opacity of the background (0 being transparent and 1 being opaque).
Please note that the line number refers to Juicebox-Pro v1.2.0.

Thank you for clarifying.
I have been able to replicate the issue you are experiencing and can confirm that it is due to the backButtonHAlign configuration option not being respected in Small Screen Mode.
I have logged a bug report and this should hopefully be fixed in the next version of Juicebox-Pro (although I do not know when this may be).
In the meantime, a suitable workaround would be to set buttonBarHAlign="RIGHT" and leave backButtonHAlign at its default value of 'LEFT'.

Highlighting selected thumbnails in the 'Images' tab of JuiceboxBuilder-Pro is on the roadmap and will hopefully be included in a future version of Juicebox-Pro (although I do not know when this may be).

Thank you for providing the details.

As the image filenames form part of a URL when uploaded to your web server, make sure that the filenames use only web-safe characters.
Please see section 2.3 of this document for details.

JuiceboxBuilder-Pro should be able to handle all images whose filenames use any or all of these characters.

Lightroom plugins can be in one of two locations (usually depending on whether they were installed by the application or yourself).
Check in the following two locations:
C:\Program Files\Adobe\Adobe Photoshop Lightroom 4.3\Shared\webengines
C:\Users\username\AppData\Roaming\Adobe\Lightroom\Web Galleries

I would start from scratch and do the following:
(1) Delete all instances of 'juicebox.lrwebengine' from the above two locations.
(2) Download the Juicebox Lightroom Plugin from here.
(3) Follow the Upgrading to Juicebox-Pro instructions.

Once you have replaced the plugin's Juicebox-Lite 'jbcore' folder with the Pro version, the plugin will have no option but to use the Pro files and the Juicebox badge/link will no longer be present in all subsequent galleries created by the plugin.

No. Once you have upgraded the plugin to Juicebox-Pro, you will be able to create galleries with more than 50 images with no further action required.

When using thumbsPosition="LEFT", you may need to change the default values of maxThumbColumns and maxThumbRows (which are '10' and '1' respectively, suitable for the default value of thumbsPosition which is 'BOTTOM').
Try setting:

thumbsPosition="LEFT"
maxThumbColumns="3"
maxThumbRows="3"

Configuration option values are case-insensitive so it does not matter whether you use 'left' or 'LEFT'.

You can drag and drop individual thumbnails into a new order in the 'Images' tab. You can also drag and drop Shift-Click and Ctrl+Click selections of thumbnails.
Additionally, you can sort images into File Name or File Date order via the 'Images -> Sort' option from the drop-down menu at the top.

Please confirm which operating system and versions of Adode AIR and JuiceboxBuilder-Pro you use so that I can pass on the details to the developers in order to help them to fix this issue.
If you are using the combination of Mac OS X 10.6, Adobe AIR 3.5 and JuiceboxBuilder-Pro, try reverting to Adobe AIR 3.3 which can be downloaded from the 'Adobe AIR 3.3 runtime downloads' link on this web page.

A NextGEN-sourced WP-Juicebox gallery is not 'converted'. Juicebox creates the gallery live from the NextGEN data at the time the gallery is displayed. Therefore, just add images and/or captions to the NextGEN gallery that WP-Juicebox uses and the changes will be reflected in the Juicebox gallery the next time the gallery is displayed.

Either clear the 'Alt & Title Text' fields in your NextGEN gallery or modify WP-Juicebox as follows.
(1) Open the 'wp-juicebox/config.php' file in a plain text editor.
(2) Change line 101 from:

$title_text = $new_dom_doc->createCDATASection($attachment->alttext);

... to:

$title_text = $new_dom_doc->createCDATASection('');

(3) Save the change and re-upload the file to its original location on your web server.
Please note that the line number refers to WP-Juicebox v1.2.0.

(1) Upgrade WP-Juicebox from Juicebox-Lite (which it comes bundled with) to Juicebox-Pro by following the instructions here.
(2) Use the thumbsPosition configuration option in the 'Pro Options' text area of your gallery's settings window, e.g.

thumbsPosition="TOP"

A description of the thumbsPosition configuration option can be found in the Thumbnail Options section of the Config Options page.

Please be assured that we test Juicebox in all major browsers and all bugs found (no matter how small) are logged, prioritized and fixed as soon as possible.

I do not know if or when Juicebox v2.0 will be released (though I expect it is a long way off yet) or what will happen to the v1.x branch when it does. As v1.x is actively being developed, I would not worry about v2.0 yet.

@djo

Thank you for reporting this flickering issue in Firefox 18.
I have notified the developers and it should be fixed in the next version of Juicebox.

You can use WP-Juicebox (the dedicated Juicebox plugin for WordPress) to create and edit Juicebox galleries within the WordPress Dashboard. When creating a gallery, just select 'NextGEN Gallery' as the 'Image Source' and type in the NextGEN Gallery Id.

Showkase is a PHP web application which would enable to you create a portfolio website online (complete with Juicebox-Pro and/or SimpleViewer-Pro galleries) via an internet browser interface. Showkase cannot be used in conjunction with WordPress.

If using WP-Juicebox to create your NextGEN-sourced Juicebox galleries, WP-Juicebox pulls in the image titles from the NextGEN 'Alt & Title Text' fields and the image captions from the NextGEN 'Description' fields.

The 'Add Juicebox Gallery' icon or button is displayed in the toolbar on the 'Create' or 'Edit' post page. (In 'Visual' input mode, the Juicebox icon is displayed and in 'Text' input mode, the 'Add Juicebox Gallery' text button is displayed.)
I have just checked the current version of WP-Juicebox (v1.2.0) in Chrome 24 and I see both the 'Add Juicebox Gallery' icon and button.
If the icon/button is displayed in other browsers, then try clearing your Chrome browser's cache before reloading your page to see if this makes a difference.
If the icon/button is not displayed in other browsers, then check that you are using the most recent version of WP-Juicebox (v1.2.0), deactivate all other plugins and reactivate them one by one until you find a conflict. If you do find a conflict, please post back to let me know so that I can investigate further.

After entering your NextGEN Gallery Id and clicking the 'Add Gallery' button, a shortcode such as the following should be entered into the body of the post.

[juicebox gallery_id="1"]

If this does not happen, then you may have another plugin installed which is conflicting with WP-Juicebox.
Once again, please check that you are using the most recent version of WP-Juicebox (v1.2.0), deactivate all other plugins and reactivate them one by one until you find a conflict.