Getting the error:
Fatal error: Unsupported operand types in /home/.../public_html/forums/includes/functions_gallery.php on line 783
That is when I click on a thumb to view, all of my categories, etc have disappeared.
Nornally, this happens after a user tries to add a category himself. I find the category he tried to make, delete it, everything returns. I have so many categories, I'm not sure what was added.