Hi there,
I have found a solution (at least for my case): Update the jQuery UI library on WordPress Core.
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IMPORTANT: If you want to try this, be sure to backup any file used here.
This is only a quick-fix the complete solution will be release at WordPress 3.1.
Use this solution at you own risk.
Pack: http://bit.ly/eAp34K
Files included in the pack:
ui.core
ui.dialog
ui.draggable
ui.droppable
ui.rezisable
ui.selectable
ui.sortable
ui.tabs
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Instructions:
Download 1.8.7 UI Pack:
http://bit.ly/eAp34K
unpack it.
Replace the files (trough FTP) in yoursite/wp-includes/js/jQuery/ with those included in the pack. *Backup your files.
Go to: yoursite/wp-includes/
Download and backup script-loader.php:
Open it with your favorite editor (dreamweaver, Notepad etc.) and look for this lines:
$scripts->add( 'jquery-ui-core', '/wp-includes/js/jquery/ui.core.js', array('jquery'), '1.7.3' );
$scripts->add_data( 'jquery-ui-core', 'group', 1 );
$scripts->add( 'jquery-ui-tabs', '/wp-includes/js/jquery/ui.tabs.js', array('jquery-ui-core'), '1.7.3' );
$scripts->add_data( 'jquery-ui-tabs', 'group', 1 );
$scripts->add( 'jquery-ui-sortable', '/wp-includes/js/jquery/ui.sortable.js', array('jquery-ui-core'), '1.7.3' );
$scripts->add_data( 'jquery-ui-sortable', 'group', 1 );
$scripts->add( 'jquery-ui-draggable', '/wp-includes/js/jquery/ui.draggable.js', array('jquery-ui-core'), '1.7.3' );
$scripts->add_data( 'jquery-ui-draggable', 'group', 1 );
$scripts->add( 'jquery-ui-droppable', '/wp-includes/js/jquery/ui.droppable.js', array('jquery-ui-core'), '1.7.3' );
$scripts->add_data( 'jquery-ui-droppable', 'group', 1 );
$scripts->add( 'jquery-ui-selectable', '/wp-includes/js/jquery/ui.selectable.js', array('jquery-ui-core'), '1.7.3' );
$scripts->add_data( 'jquery-ui-selectable', 'group', 1 );
$scripts->add( 'jquery-ui-resizable', '/wp-includes/js/jquery/ui.resizable.js', array('jquery-ui-core'), '1.7.3' );
$scripts->add_data( 'jquery-ui-resizable', 'group', 1 );
$scripts->add( 'jquery-ui-dialog', '/wp-includes/js/jquery/ui.dialog.js', array('jquery-ui-resizable', 'jquery-ui-draggable'), '1.7.3' );
$scripts->add_data( 'jquery-ui-dialog', 'group', 1 );
Reaplace all '1.7.3' with '1.8.7'.
Save the file and upload it to your server (to the same path).
Done, now you can add galleries to albums.
I hope this fix your problem.