Hello guys

I've got the problem that the game runs very strange after downloading the latest release.
It sometimes gets stuck while playing (for some seconds 15-20 sec.) the game and suddenly speeds up afterwards and moves everythin in almost twice the speed it was before until it reaches the normal level of speed.
Then this routine will repeat in a few seconds.

I tried to use OpenJDK and Sun JRE 6 but nothing helped me in this case.
Maybe there is a problem with the paramters in the script mule.sh

Does somebody have an idea?
Thanks in adavance.
armule