I have XT910 which is (I think) the same model as Droid RAZR.
I had the same problem before the last update (overflow) and with the last update its fixed, thank you!
But now I cannot choose which directory will be displayed when the application starts. It always starts with the root folder although I have chosen (through preferences/directories/) another folder (sdcard-ext/mobile/music/). It seems to have saved my setting but it ignores it. Two versions before it worked.
I hope for a new update!