I was playing Spiral Knights with my 1st account. When i press the button Go To Haven, it's only black screen and nothing happens. Strangely, with my 2nd account, i can enter Haven.
Can somebody tell me what's happening?!
Problem solved. It seems I had to wait for the system to reboot "facepalm"
This is a frequent problem, move to technical issues, fairly sure they can help you there.