@daniel silveira

For an automated solution to multiple-gallery support, you might like to take a look at either:

(1) svManager
This is a separate product (a PHP web application) which allows you to create and manage galleries online through a web browser interface.
You can create Juicebox galleries with svManager itself or you can create Juicebox galleries by another method (such as JuiceboxBuilder-Pro), upload them to your web server and import them into your svManager installation.
svManager creates an index page of all listed galleries comprising thumbnails which link to the individual galleries.
Here is a sample svManager index page.
You can try svManager via the online demo here.

... or:

(2) Juicebox Skin for jAlbum
jAlbum is a desktop application which allows you to create a multiple-gallery album in a single action.
When using the Juicebox skin, you can drag and drop a complete folder structure into jAlbum's main window and click 'Make Album'.
The resulting album will have a separate Juicebox gallery for each and every folder/subfolder in your input structure and all the galleries will be linked together via a JavaScript navigation tree.
Here is a sample album created by jAlbum and the Juicebox Skin.

For a manual solution to multiple-gallery support, please see the Embedding Multiple Galleries section of the 'Juicbebox - Embedding Guide' which covers 'Multiple Galleries on Separate HTML Pages' and 'Multiple Galleries on One HTML Page'.

This still seems to hold true with Chrome 20 on my PC but different browsers will cache files differently. Hitting F5 is enough to reload the page afresh (from the web server rather than the browser's cache) in Chrome 20 (on my PC) whereas CTRL + F5 is required in Firefox 14.0.1 and a complete clearing of the browser cache may be required in other browsers.

Try defining your gallery's XML file with a unique identifier (e.g. the current time which will be different each time the browser loads the page) using the configUrl option in your gallery's embedding code.

<!--START JUICEBOX EMBED-->
<script src="jbcore/juicebox.js"></script>
<script>
    new juicebox({
        containerId : 'juicebox-container',
        configUrl : 'config.xml?nocache=' + new Date().getTime()
    });
</script>
<div id="juicebox-container"></div>
<!--END JUICEBOX EMBED-->

Your gallery displays OK on my iPod Touch (iOS 5.1.1) over wi-fi.
Try clearing your browser's cache before reloading the gallery and ensure that JavaScript is enabled.

It is not possible to set different background colors for normal and expanded modes.
Juicebox-Pro uses the same backgroundColor parameter (in the embedding code) for both.

You can remove the underline from a link by using text-decoration: none; e.g.

<a href="mailto:email@address.com?subject=test" style="text-decoration: none; font-size: 20px; color: #ff0000;">Click here to email</a>

@ErikGr

Juicebox-Pro does not feature search functionality for local images.
However, you could use a Flickr account as a source of images and tag your images with keywords.
You could then allow the user to enter keywords and have your gallery display the corresponding tagged images.
Take a look at the Lite Flickr demo gallery on the Juicebox - Demos page to see this in action.
You can view the source of the page in your browser and modify it to suit your needs.

When using the <font> 'size' attribute, SimpleViewer's Flash Player took the number to be an absolute pixel size but Juicebox (being HTML rather than Flash) takes the number to be on a scale from 1 to 7 (7 being the largest size possible).
Please see this web page for details.
As an alternative to using:

<font size="3">Text Goes Here</font>

... you could use the following:

<span style="font-size: 20px;">Text Goes Here</span>

There are certain options that have direct equivalents and some (such as frameWidth) even use the same name. The full set of Juicebox-Pro options can be found here and the full set of SimpleViewer-Pro options can be found here.

The caption text color can be changed by setting the textColor Pro Option (not available in Juicebox-Lite). However, this can be overridden in the caption itself (in both Juicebox-Pro and Juicebox-Lite) by using a caption such as:

<span style="color: #ff0000;">Text Goes Here</span>

In answer to this question, the Lightroom plugin would be most suitable (and is the only method of creating a gallery within Lightroom 4). You can select metadata such as the IPTC Caption or Title to be used as the Juicebox caption or title from the drop-down menus in the 'Image Info' section.

You would then have to upload your gallery folder to your web server and embed it in a WordPress post using one of the two methods documented here.

However, you could create a Juicebox gallery using a NextGEN gallery as a source of images from with the WordPress Dashboard by using WP-Juicebox (the dedicated Juicebox plugin for WordPress). Create a new post, click the Juicebox icon, select 'NextGEN Gallery' as the 'Image Source' in the settings window that pops up and type in the numerical NextGEN Gallery Id that you would like to use.

Yes. Please see this forum thread for details, specifically, the reply to the original poster's query #3.

After making changes in the Media Library, you will need to 'Edit' the post and 'Update' it in order to rebuild the gallery's XML file (which will remove any entries corresponding to images which are no longer attached to the post).

Click on the 'Screen Options' tab at the top-right of your WordPress Dashboard and you will then be able to enter the number of media items to be displayed per page.

The latest version of WP-Juicebox (v1.1.1) supports using NextGEN galleries as a source of images.
When creating a new gallery, select 'NextGEN Gallery' from the drop-down 'Image Source' menu and type in the numeric NextGEN Gallery Id in the text field that pops up.
The latest version of WP-Juicebox can be downloaded from this page.

I notice that your gallery uses Juicebox-Pro v1.1.0. The bug you have reported has been fixed in v1.1.1. Please see this Juicebox Blog entry for further details.

Please upgrade your gallery to Juicebox-Pro v1.1.1 (by following the instructions here) and the Button Bar buttons should no longer disappear on closing the expanded gallery.

The indexPageName entry is written to the 'config.xml' file by JuiceboxBuilder-Pro so that when an existing gallery is opened and edited in JuiceboxBuilder-Pro, the application can populate the 'Index Page Name' field on the 'Publish' tab correctly (and then update the file on clicking 'Save').

A caption such as the following should work fine:

<caption><![CDATA[<a href="mailto:email@address.com?subject=test">Click here to email</a>]]></caption>

If using JuiceboxBuilder-Lite to create or edit your gallery, you can simply enter the following into a caption text field (JuiceboxBuilder-Lite will add the necessary <caption> and CDATA tags for you).

<a href="mailto:email@address.com?subject=test">Click here to email</a>