please see below someone posted on another site. I dont have B5 to test. thanks
"Alert! Buzz 10/9 software update and remote control"
"So, today i updated one of two B5 boxes only to find:
1. The remote number keypad no longer functions.. In other words there is no way to enter channel number directly
2. The CH UP/DOWN button does not work.
The only way i found to change channel is by using the directional (up/down) arrow buttons.
The other box was not updated and the remote works as it should.
Hopefully Buzz fixes this issue for the B5 and corresponding remote (IR-100)"