Hi,
echo %{version} > %{_datadir}/mugshot/version
Now, there are still a downside: you have to wake up to check for an
upgrade every so often. If you wake up too often, you drain power.
If you wake up less often, it might be a while before you switch
versions, so the desktop component needs to be robust against that.
Why aren't you just watching the file with inotify or gamin or whatever?
--Ray