I found the Play, Pause and FW/BW and they actually work. For a second I thought, when I pressed the Pause key and then Play, it helped it, but then I wanted to see if I can use those buttons, and now it still jumping. I am not sure if it helped it or not first time, but it not helping any more. This jumping reminds me when Sonar was unstable on my old computer. I just invested a lot in to it being stable, so it has to be stable- no more excuses. There is no old drivers, no incompatible hardware- quad core processor, 16 Gb memory- what else does it want from me??? :)