We fixed that by deleting the thread (there was a thread but no associated comment) - we're going to see if it happens again so that we can reproduce it and nail it if it's a silly bug somewhere (probably is:)
Another bug report
In the "Merchants and Marketplace" section there is a thread called "Is there a current list of businesses that accept Monero? Clicking on it produces the following error:
http://tinypic.com/r/2uihzs5/8
Cute, but still an error. :)
Also, the thread seems to have "-1" replies.