I recently moved my site from one host to siteground's. The latter's tech support did the file and database transfer. After this, however, my galleries started acting weird:

Thumbnails for galleries are on and off, ie. there are page loads when the thumbnail appears (set to random) and there are ones that only a small box is displayed. Subsequently, when the thumbnail does not load properly, the whole gallery does not display its thumbnails when opened, thus rendering the gallery inaccessible. Here's a link to my gallery and as you can see, no thumbnails is displayed. Clicking on any of the small boxes where the thumbnail should have been will open the gallery but all the thumbnails are also missing. http://www.the-eastbridge-school.net/index.php?option=com_rsgallery2&Itemid=64&gid=40