Comment 27 for bug 868188

Ok, I may be doing something wrong or misunderstanding something and if so please point it out to me but this fix doesn't seem to work for me.

I enabled oneiric-proposed via "Ubuntu Software Center→Edit→Software Sources→Updates". Then I ran Update Manager, which found found an update to Software Center (amongst other things). I then installed all updates. After this was finished I was still unable to install an lzma compressed deb and I notice that the lzma package is not installed.

P.S. Surely the best way to fix this would not be to add any more dependencies to Software Center (which bloats the system) but rather to have Software Center use xz to read lzma compressed data if lzma is not available. This is what other utilities like tar and dpkg do, which explains why people could work around this issue by installing via the command line and did not need to install lzma to get this to work with dpkg.