The < > supposed to work as usual! I dont have the player with me so I can't try it right now. It should be for both < and >
> down, > up - skip
> down, hold > - seek forward
> down, > up, > down, hold > - skip to next folder
It isn't like that? I will double-check it this evening. Are you using 0913 build?
I'm using the latest build you've posted here, but this has been the same in all the builds for the DX50 so far since the first one I tried, the 2014-03-26 one. The skip to next track function of the physical buttons hasn't worked in any of the rockbox versions. It works fine in mango on my device. The >down, hold - seek forward works fine. I've tried a million different times, with different button press times, it hasn't worked once. I've had rockbox on 4-5 other devices, it's always worked fine on them, so I'm pretty sure the problem in in this build of rockbox. Unless there's a setting that I'm not aware of that might be disabling this.