Samsung has released another minor update for the Samsung Galaxy Tab 10.1 Wi-Fi. The small update addresses some bugs. The update addresses the graphical corruption bug that was introduced with the TouchWiz option, but it's not known exactly what is updated. Samsung only says that it "improves stability."
To see if the update is available, go to Settings > About Tablet > Software Update.
To see if the update is available, go to Settings > About Tablet > Software Update.