[patalp]

I just updated rockbox yesterday on my Sansa C250v2 (c200v2) and it works great now. So far, I haven't had any random crashes during playback. There's some glitching with the upper statusbar, but if I change the options for the status bar to be displayed at the bottom, there's no more glitching.
The hiss problem hasn't been fixed yet, but during playback with my TF10 it's not noticeable. With my Sennheiser HD280, the hiss is not noticeable even with playback paused.