OK, so I purchased a 32GB iPod Touch on Black Friday and it is definitely sweet. The one thing I cannot figure out is what is causing the playlist currently playing to reset from time-to-time. As no one apparently no one feels the need to make cases with belt clips anymore

, I keep the iPod in my shirt pocket at work. Sometimes when I place the iPod in my shirt pocket the music will stop when the iPod hits the bottom of the pocket, then I hear a tone; kind of a subtle blee oop. After a brief pause, a new song from the same playlist begins to play.
The first time this incident occurred I thought that I may have inadvertently skipped to the next song while placing the iPod in my pocket. In my attempt to go back one song, tapping the previous track button does nothing indicating that the currently playing selection is the first song selected from the playlist.
Does anyone have any ideas as to what is being tapped when I place my iPod Touch in my pocket that causes this anomaly to occur?