So I began to root awhile back and installed the spr recovery. I never went further than that. I then tried to apply the new 2.2 update as mentioned and quickly discovered that technically I was rooted so this would not work. So I unrooted back to stock 2.1. I now have again tried to install 2.2 and it continues to fail. failed to verify whole file signature, and signature verification failed. installation then aborts. I have downloaded the 2.2 update several times to ensure it has downloaded correctly and every time I come back to this. Any ideas?