Thanks Paul.
I tried it again this morning with the same CDR. After 30 seconds of displaying 'DB Lookup', the CD stopped spinning and my b2 just sat there locked up. After a minute & a half, nothing had changed and no button presses on any of the buttons would change that. Eventually holding in 'Play/Stop' for over 15 seconds a couple of times produced 'Saving' on the screen and I was able to coax my b2 back to life with no damage done.
If the DB Lookup had a maximum 15 or 20 second time out, after which it simply offered 'Album xxxx' by 'Unknown' as the only rip option (as it used to do), at least I could rip or simply play the CD. As things are, I can't get beyond the 'DB Lookup' screen - prior to this screen appearing, pressing 'Play' plays the HDD only.
It's just a minor irritation and I'll await an update. Thanks. Andy