Fatal error: Unsupported operand types

[glorify]

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.

http://www.glorifythepast.com/vbagallery/

VB--3.6.8
Gallery--2.3
PHP--4.4.4
Mysql--5.0.27

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.

Help.

[glorify]

Looks like it comes from a members category. If I disable the category, everything reappears.