Party Lobby is CPU hogging beyond control - help plz

[XxPauloxX]

E-mailing and notifying them of the magnitude of the problem is our only hope (I hope I am wrong though), but things may go faster in the right direction if we ALL send complaints. Mine is already sent!

Anyone here has a computer with dual-core processor? I am very curious about whether you also have 80-95% CPU usage while playing and mining, or if it is significantly lower??