I am listening to an audio book MP3 that is 11:59:30 hrs long. Everytime I pause the audio file and let the player power down the player will lose the listening position (the time display doesnt change, just the listening position). It appears that 1/2 hr of displayed time = 1 hr of listening time. This may sound confusing so I will try to explain with an example below.
I power up the clip and find the correct listening position on the clip by fast forwarding or rewinding. The player displays 2:37:03 at this position (in media player, its actually over 5 hrs). I listen to an hour of audio, then pause the book at 3:37:03, and let the player power off from inactivity. I power back on and it says I am at 3:37:03, but when I hit resume I have to rewind to around 3:03:00 to get back to where I left off. Very annoying. Confirmed on 2 seperate sansa clip players, both at firmware level 01.01.30A.