UPDATE: Well I just came back from a car trip, using a rockbox daily build for the entire 7+ hours (round trip) while using the default theme. I only had the static problem once, but it did still occur even after turning off the hardware/software eqs. The screen did freeze, though the music continued, a few times (I believe this is due to a bug with the peek meters?). The time the static problem did start the meters weren't frozen, it was after selecting a short ep, all in one folder, to play, and I couldn't reproduce the bug through other plays of the ep, all starting from the first song. Again the files are encoded using a LAME encoder at 192 kb for the mp3s.
Anybody else still experiencing this problem? It really doesn't happen that much anymore, but it is pretty painful to my ears when it does.