Yes, very much looks like the linux-backports-modules-wireless packages are to blame. When trying to purge them I get
dpkg: warning: while removing linux-backports-modules-wireless-2.6.32-20-generic, directory '/lib/modules/2.6.32-20-generic/updates' not empty so not removed.
Purging them fails anyhow, that will be another bug to report.
Yes, very much looks like the linux-backports -modules- wireless packages are to blame. When trying to purge them I get
dpkg: warning: while removing linux-backports -modules- wireless- 2.6.32- 20-generic, directory '/lib/modules/ 2.6.32- 20-generic/ updates' not empty so not removed.
Purging them fails anyhow, that will be another bug to report.