Comment 13 for bug 574155

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Daniel Gnoutcheff (gnoutchd) wrote : Re: Software-Center does not remove deactivated ppa's

Manually running
$ sudo /usr/share/software-center/update-software-center
seems to have made the problem go away. Looks like this may have something to do with software-center's xapian cache under /var/cache/software-center/.

BTW I did make a backup of /var/cache/software-center/ before running that command, in case that's useful for debugging.