The forums were updated as it seems, and now I experience a bug related to Facebook feature. I was editing a post, upon saving i got hit by a red error message stating that I don't have the rights to do this action and I must log inn to continune. HUH? I refreshed the page, and I was logged out. Although I got automatically logged back in, the same issue just happened when I marked a forum read.
Using latest build of Opera. This issue has not been there this morning.