Magic keyboard stopped working after latest OS X updates (June 2013)

My iMac: Just performed the latest OS X updates (M Lion) that appeared sometime late May or June 2013. I think the updates were some camera updates and iTunes, and some other things that needed a restart of the computer. After reboot the magic keyboard (that came with the iMac) stopped working. I couldn't enter the password on login screen. Funny thing was the keyboard seemed to be paired with the computer, as the light buttons and the volume buttons worked, but only them, nothing else responded.
Even trying to restart/shut down the computer did not help. Actually shutting down the computer did not work, the spinning thing spun for a while and then the login screen reappeared. No progress.
Fix: In the end I hit the physical power button and forced a shut down. After booting up, the keyboard worked again.
Maybe this can help someone.

Eric,
Sorry to hear that but my aluminum Bluetooth keyboard for my 27" iMac is working fine after the Supplemental Update.

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