Charge attack "stutters" very often. Even though the mouse key remains pressed, a lot of the time the charge attack interrupts or if already charged is executed randomly. Does not appear to happen as often when at the same time other mouse keys are pressed, too. This leaves the game almost unplayable for me.

This is a relatively new bug, everything worked fine a few months ago. I tested my mouse buttons in other java programs and games - it works fine everywhere else. Using x86_64 jre7-openjdk 7.u9_2.3.3 on linux.