Comment 1 for bug 645924

This is distinct from bug 703807 because the file really is thought to be text/plain in the db (rather than it being served up with something other than what launchpad thinks it should have).

Looking at all libraryfilealias ending in .tar.xz, the vast majority are application/octet-stream, but there are some text-plain. In particluar, the oldest ones (prior to 2011-03) tend to be text/plain. I don't know if it gets set by the upload client or by Launchpad, or what changed around then. The most recent is PyGL3Display on 2011-05-26.