Got the official EC05 froyo update from sprint today and I installed it over my previous official EB13 version (unrooted).Everything worked fine except for the annoying screen orientation lag when switching between portrait and landscape:-( It was ridiculously slow and een after calibrating it thetraditiona way, noticeable lags still existed. Did something crazy with the calibration and it fixed the annoying lag issue. After clicking calibrate button, I tilted the phone and put it on the screen side over a flat surface instead of traditonal method(I.e. leave the phone on camera lens side over flat surface). Result was almost ZERO lag when switching between portrait and landscape modes for all supported applications. Give it a try - it worked for me and I am glad the lag is gone finaly!!!!!!