Recently I had some trouble with google play app - first, I was getting "connection error" when using wifi. I cleared the app chache, uninstalled updates and after I played with it a bit more, it completely stopped woking giving me the "connection error" also on 3G.
I erased my device and installed CyanogenMod 10.1.
Now the Google Play app woks great but when I go to Google Play website, my device seems to be out of sync - it is grayed out and the list of apps installed is out of date.
How to fix this? Any ideas?