[@robin-w Moderator 11 years, 8 months ago]

ok, it’s working fine on my test site with bbpress and twentyten.

It could be a theme or plugin issue

Plugins

Deactivate all but bbpress and see if this fixes. if it does, re-enable one at a time to see which is causing the error.

Themes

If plugins don’t pinpoint the problem, as a test switch to a default theme such as twentytwelve, and see if this fixes.

Then come back