Just came here to chime in as well. I was playing Frontline last night and got a 90k error, which is odd since that doesn't seem to happen often at all, so I dismissed it as a weird coincidence. I woke up this morning to see I can't even get on at all cause I keep getting an error while trying to connect to the server or even sometimes getting kicked off right from the lobby.
Funny how these problems only started occurring after this latest patch... And this was even after you guys spent additional time on the patch for 'emergency maintenance', yet we're still having issues. Hope this gets resolved soon.