This morning Firmware Watcher showed that the apparently problematic update, 0x66C, was not in the update stream for my HR24/100 anymore and an older(?) firmware, 0X62C was now current. 0x062C seems to be now current for all HR's. I forced an update and received 0X62C and my menu delays have apparently gone away. YMMV! Edit: Lost all my Season Links with the "downdate", but all other settings, Favorites and recordings are there!