This rom is the best JB for GT540.
Problem is solved = after installing your latest update, Calnedar works fine.
Gtalk doesn't work but it has never worked on ICS I think.
GenieWidget with transparent background for ICS: http://dl.dropbox.com/u/230395/GenieWidget.apk
To people who view this thread using a bookmark:
Google Engineer Debunks Myth: Wiping Battery Stats Does Not Improve Battery Life
I was looking for it in the Profile, I think avatar should be there ...
Google Maps added.
E:Error in /sdcard/ICS_GAPPS_AUG-2012_GT540.zip
Intallation aborted. (CWM v126.96.36.199)