The software hosted in extras-devel is not ready for normal users!
PLEASE PLEASE PLEASE don't play with it unless you really know what you are doing. Be ready to file proper bug reports instead of posting complaints.

Expected problems: crashes, battery drain, poor system performance, full disk space & more - SERIOUSLY!
Don't play with Extras-devel if you haven't backed up your data or aren't prepared to re-flash your device.