So, I just did the update, and immediately upon the reboot...nothing was there. This isn't a "the SD card is corrupt" issue, because system icons aren't appearing either. I turned it off, took out the SD card and game cart, adn still nothing, I just have a giant array of blank spaces where my icons should all be.
To make matters worse, though the d-pad is fine, the ABXY buttons don't seem to be doing anything, and when I tap anything other than bigger/smaller icons, the system just freezes.
This is really weird, and really causing me problems! Has anyone else run into this and is there any way to fix it?