Have an HR21-100, two nights ago the receiver was "locked up." Received 22B on 4/23. Had been watching hockey on Versus. When game ended, turned tv off but left receiver on (which I normally don't turn off.) Came back later and turned on TV, still on Versus but couldn't change channel. Remote and on-box buttons all non-responsive. Only recourse was to power cycle by unplugging. The reboot was protracted as it had to re-discover satellites, etc. and a couple times it looked like it was hung as progress meter would pause (most notably at 97%) Since then working okay... I've only had the three weeks but it had not done this before 22B and of course, only once since.