Android.process.acore has stopped unexpectedly

This does not work after further testing. :(

This is what i tried and so far so good.. :)

"
If you go to Settings/Applications/Manage Applications/ then choose the All tab.
Scroll down to Contacts open it and clear the data cache.
Now do the same again but this time open Contact Storage and also clear the data cache.
This issue is related to an Android bug and affects many devices. It's related to apps that use the sync function.

Source
"

Tips: Quick tuning of screen brightness in Samsung Galaxy S II (2)

Press and hold on the notification bar for a short while.
Then move left or right to decrease or increase the screen brightness accordingly.

Nice! :)