Comment 4 for bug 905454

I'm not sure why this was closed or marked invalid. I am encountering this same problem, also trying to upgrade from 11.04 to 11.10. In bug 961719, the same issue is reported attempting 11.10->12.04.

Any idea why this package (postgresql-plperl-8.4) is on the "removal blacklist?" Whatever exactly that means. It's something you'd expect with spam, not Free Software! ;)

I too was able to remove it manually, and the upgrade is currently proceeding. But I'd imagine some people will end up getting stuck or frustrated by this, and unable to upgrade...