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
Google Maps added.
E:Error in /sdcard/ICS_GAPPS_AUG-2012_GT540.zip
Intallation aborted. (CWM v126.96.36.199)
I can't install app as system app. After reboot, it disappear on launch. I found error on uiderror.txt. I don't know how to fix it. Can't I help me? Sorry for my poor English.
Copying to /system/app is not enough, you have to set the permisisons ...