Recently my client has last the ability to post new videos on their forum. When posting a video URL (as they used to), they are redirected to a 403 Forbidden screen. I can post the info here, or you can see for yourself at: http://www.nucanoe.com/forum/
Create a new account and attempt to post the URL of a video in the post/ whether it be a reply or new topic, and you'll be redirected to a 403 forbidden page.
More technical details:
I believe after updating to Simple:Press and WordPress the issue started happening. My hunch is it has something to do with the database, but I want to be sure before I hop in there too deep. Tried the normal, disabling plugins, etc.