Occasionally on my B2 and BB1 the song playing stutters. I originally assumed it was a bad rip of the song and deleted and replaced it. I also do frequent scans to make sure I don't have a corrupted SD card.
Then this morning, when a song stuttered, pressed the Play/Stop button and waited a few seconds before pressing Play/Stop again. The song seemed to start with no stutter, but a couple of seconds later the stutter resumed. So I repeated the process again - This time the song played all the way through with no stutter. I have since tried this on two more stutter tracks - both times I had to Play/Start twice on the song and then it played successfully to the end. I haven't tried this on the B2 yet, but will update you on what happens