This is a fork of Sonata Music Client for MPD (http://sonata.berlios.de/). I wanted to change the way the tray notification tooltip looked. From this:
to this:
Cover size can be set by changing NOTIFICATION_COVER_RATIO in consts.py. Default is 2, for twice the original size. Also note that this is a quick hack.
I made a patch for the latest stable version (1.6.2.1), see https://gist.github.com/3843402).