Have you tried wiping the cache partition? Probably worth trying, since you won't lose any actual data. I've read conflicting info, but I think it does more than just delete individal app caches. It seemed to help with my Razr Maxx when it was updated to ICS. The procedure is as follows:
1. Reboot your tablet into the bootloader by turning it off, and then pushing the volume down + power buttons at the same time. Keep them down until you see the bootloader appear.
2. Then, use your volume buttons to change the selection to "Recovery," and press the power button to select.
3. If you?re on stock Android, wait until you see the Android with the red exclamation point, and press volume up + power at the same time. Select the option to clear your tablet?s cache partition.