It cleared up ~3 hours after the post when i tried to login again and haven't encountered it since. someone else in the shoutbox was also having issues getting in at the same time (a little bit before 2 am CST), which makes me think it might have been something related to an unannounced server reset im not aware of and not a bug in the game code but i could always be wrong. Probably botched the SS they want because i forgot that print screen button only works for client based games. Bah
Edit: also there is this which i believe this issue falls into because of the error message pop-up and it seems like its supposed to be some kind of imposing deterrent in the thread you linked which is usually a whole section in most client forums.
If you cannot reproduce the bug yourself, it may be a technical error or issue and not a bug!