This happens to me too. For me is doesn\'t seem to be the rain that is causing the lag.
I log in and start playing - everything is fine, but after a few minutes the game starts lagging (framerate drops), and thus making it impossible to do anything but typing message on the \"chat box\". And the longer I wait, the lower the framerate seems to drop. After about 10 minutes - at this point with ~0.03 FPS - I couldn\'t stand it anymore, and exited the game. I also read the output on console, but I didn\'t find anything \"paranormal\".
System specs:
AMD Athlon XP 1700+ on Abit KT7A
512 MB SDRAM
Geforce 2MX 200/400
Running linux
I should also mention that before yesterday I had no problems at all with PS.
P.S. Maybe this should be a bug-report instead?