Just want to say that i did nothing BUT the "C:\Users\YOURUSERNAME\AppData\Local\ArmA 2 OA\BattlEye and delete the BattlEye.dll"-step, and now appear to be able to join servers again :s. My problem before wasn't even the battleeye message (anymore, had that earlier when using the newest beta, back-patched to 94876), but that my game was crashing to desktop while trying to join. I don't really want to recommend this solution since i guess it could have unforeseen consequences, and I've only tried it launching through steam so far. But it appears to be working now - computers man, I do not compute them...