It's an error message that posters have been getting while trying to view threads or post on them. He called it "the angry bear" because of the graphic and jokey format that Proboards uses to display an error.
Thanks! (I just signed up...there was a error in vieweing..I searchred for the topic and came with a motherlode (sort ot) of info on the angry bear...I can describe the users as angry bears if they have the problem..
For it is written: the inhabitants of the Earth have been made drunk with her blood. And I saw her sent upon a hairy beast and she held forth a golden chalice full of the filthiness of fornications. And upon her forehead was written: "Behold I am the great mother of harlots and all abominations of the Earth."