This problem seems to have been resolved by a further upgrade to current testing:
Start-Date: 2014-07-23 07:26:21 Commandline: apt-get -f -t testing dist-upgrade Wireless connectivity now works very well again. I have no idea which was the crucial package, but I'm relieved and grateful, Jim -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org