Droid reboots during mp3 play

[kapeman]

I have started having a very annoying issue with my Droid X.

Almost without fail, while I am working out listening to MP3s the screen goes black and is unresponsive.

The other day the light was just right and I was (barely) able to see the droid "eye" indicating a reboot.

This happens with both iSyncr and the stock music player.

I use the one-tap cache cleaner occasionally and recently did a boot to the service menu and cleared the system cache.

One other thing I have noted recently that just started is that my Dolphin HD browser is very sluggish at times.

I do a shutdown and battery pull fairly often.

I am running stock GB, not rooted.

Any help would be greatly appreciated.