Savin, what setup are you using for perp? I had this happen to me but only on my new computer with an ati card. My old computer with an nvidia gtx280 runs the game lag free. Both computers have an i7 processor on win 7 premium with 6 gigs of ram. The only differance between the computers is that perpetuum was installed first and ran first on the non laggy nvidia computer. I also installed a new router to use two boxes at the same time, perhaps that has more to do with it?

Just wondering if we share a common factor that lead to the buggy clients. I am assuming that your client was working well at some point and perhaps some hardware or software change brings on the bugs. I can grab a dxdiag when I get home if we really want to get deeper into the cause of the lag.

If there is a dev reading is there anything else I can check between the two client computers to figure out where the lag is coming from? If I can be of an assistance to tracking down the cause I would be happy to help.