Having the same problem, XMPP Connection Failure. Have emailed quakelive technical support. Here's the reply.....
Thank you for taking the time to report this issue to us and we apologize for any inconvenience it may have caused you.
We were able to determine was cause of this situation and have implemented a solution. This solution is available to you at this time.
If you are still experiencing this issue, please do not hesitate to let us know about it.
The QUAKE LIVE Tech Support Team
Hey Ordus, the problem is not solved.
PS: I'm a pro subscriber.
Can anyone shed some light on this problem? I wouldn't be so anxious if I weren't paying for this service.