hello, i got this problem after relese stable U0.49. FPS drop in random time from 20-25 (my standart FPS before uploading U0.49) to 3-5 (like this: skip to 2:10 http://www.youtube.com/watch?v=dakfvDgONKs ). Another ppl have same problem (just look at "troubleshoting" section). Im tried reinstalling game (and cleaned all steam\my docs\local data folders, registry edit. too) and nothing. Im trying change settings - nothing. Last hotfix cant solved this problem. I find this problem on experimental branch and really can't understand why this corrupted build successfully uploaded on stable. My system specs:
OS Windows 7 (32)
RAM ddr2 4gb
CPU intel core 2 duo e7500
MB gigabyte p35-ds3r
GPU sapphire hd6670 1gb VRAM

i know its not the best hardware but another guys with moar powerful systems have same issue. And i still remind this game works fine before uploading U0.49.
Rigt now game unplayable for me and another ppl who have same problem..

Im sure ONLY hotfix can solve this problem.

best regards