looks to me like an update of any kind of program or even android itself reverted to the default safety measure for login...meaning none. Nice, eh? All those applications demanding access to parts of the OS that aren't (or hardly) related to the functionality of the software.
Anyway, this is just the login procedure. At least in my limited experiences with android it is. Now if you used a different program to encrypt whatever content on your tablet, I don't think you should be worried.
However, if you want to test it properly, transfer any random encrypted file from your tablet to a location (PC/Mac/tablet/whatever) that hasn't been exposed in any way or form with the encryption scheme you used on your tablet. If you can read the file without problem on that location, assume that all your data on your tablet isn't encrypted. Perhaps it never was to begin with.
Without using digital certificates (PKI or better) and/or software such as TrueCrypt (don't know if an equivalent exists for android) I don't consider anything really encrypted.