your xml file is corrupted from what i have read, to fix it all you need to do is reinstall the them again and it will replace or override that file and should work again.
did you not turn off the M2d theme when you installed something? if so it could corrupt that file.
so go to your today screen turn off M2D theme then install your app then when finished go to the today screen and then check your M2D to turn it back on
start/setting/today
check the 1st on on the list
http://forum.xda-developers.com/show...postcount=2741