You waited until it was out of warranty to root it? All that wasted time! In the future, you can always reflash the factory rom to the device, and you'll be fine. I've done so with a number of devices that I've rooted only to have crap out on me, like the Nook Color.
Ehh, you got me! The out-of-warranty snippet is just a BS excuse I tell myself, Truth is I just do not enjoy tinkering with HW/SW as much as I once did. Hell, I have yet to finish loading Tomato on my old router, etc, etc.. I practically have a "graveyard" of toys here that need some TLC.