this is kind of an fyi post. I'm posting in this section because I don't consider this a bug and I'm not sure where else to put it. Feel free to move the thread to a different section as you see fit.
When installing Rainlendar on Natty (Ubuntu 11.04), I got an installation warning that the package was of bad quality (see attached screenshot). The text says: "The package doesn't provide a valid Installed-Size control field. See Debian Policy 5.6.20."
I don't think this is a major issue, but it might keep people from installing rainlendar.