[Clipart] [Open Clip Art Library] Navigation error on website

[noreply at openclipart.org]

Go to this page and click the "More" button 
http://openclipart.org/media/view/media/clip_art?offset=500

It takes you to this page
http://openclipart.org/media/view/media/clip_art?offset=520

which displays this error

"ERROR(8) "/var/www/openclipart.org/htdocs/cclib/cc-upload-table.php"(451): unserialize() [function.unserialize]: Error at offset 185 of 199 bytes [2008-11-15 15:47 pm][127.0.0.1][/media/view/media/clip_art?offset=520]
Down for upgrade, check back soon

Troubleshooting new installations"