[Q] Weird problem after encryption

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http://forum.xda-developers.com – The Galaxy tab 7.7 has a weird problem in ICS.After encrypting the tablet sometimes the galaxy tab randomly reboots and then I have to enter my password. But when I sucessfuly boot into the system the bottom bar is gone (home,menu,back,recent apps). I had to hard reset the galaxy tab (hold down power vol up and use vol keys to select wipe). How do I solve this issue since now I have an unencrypted tablet? (HowTos)