1.3.19 introduced a bug where the notification icon would not go away if you exited the app while playing.. so i fixed that up and also was finally able to address another long standing issue. GMMP used to crash if you were using a skin and tried to paste text into any of the edit boxes. This is now fixed.
1.3.20 (11/25/2012):
-Fixed bug where the notification would not go away when exiting gmmp
-Fixed potential crash on shutdown
-Fixed crash during playback error
-Fixed crash when pasting text into an text box while using a skin
1.3.20 (11/25/2012):
-Fixed bug where the notification would not go away when exiting gmmp
-Fixed potential crash on shutdown
-Fixed crash during playback error
-Fixed crash when pasting text into an text box while using a skin