didn't read the other thread, but it let me upload one a minute ago.  FF 3.6.2

http://www.sharecg.com/v/65053/view/1/3D-and-2D-Art/jess-icon

 

oops!  just tried a zip and:

Warning: imagecopyresampled(): supplied argument is not a valid Image resource in /www/scg/htdocs/includes/image.inc.php on line 94

Warning: imagecreatetruecolor() [function.imagecreatetruecolor]: Invalid image dimensions in /www/scg/htdocs/includes/image.inc.php on line 78

Warning: imagecopyresampled(): supplied argument is not a valid Image resource in /www/scg/htdocs/includes/image.inc.php on line 94

Warning: Cannot modify header information - headers already sent by (output started at /www/scg/htdocs/includes/image.inc.php:94) in /www/scg/htdocs/share_ .... bla bla bla

 

hence I dunno how to upload a zip there.  but I did find out I can upload uncompressed movies, provided they are at least 7 seconds (rubs hand together gleefully).