Since Lollipop is rolling out to a few devices now, a pretty major playback bug was discovered so 1.6.7 was released to fix that. Also expanded notifications should work correctly now.
I am hoping to get the first 2.0 beta done in the next few days. There are just a few remaining bugs I want to get rid of before releasing it. If its not done in the next few days, I still think it'll be ready by the end of the month.
-Fix for stuttering on Android 5.0+
-Fixed notifications for Android 5.0+
-Added French translation
-Updated target sdk to 21 (Android 5.0)
-Fixed notification background on 5.0+
-Disabled expanded notifications in 5.0+. The album art is not showing correctly, will try to fix this in GMMP 2.0.
-Added Greek translation