Synaptic still hasn't been fixed on F9. It will download the packages ok, but
complains of MD5 sum missmatches, and is unable to install the packages,
although subsequently doing an apt-get install for the packages, will install
the already downloaded packages.
The same problem appears to exist on F10's synaptic, although now there is no
warning message about MD5 sum missmatches.
Before I file a bug report, could anyone who uses apt, and synaptic confirm
that on F10, synaptic is unable to install packages that it has downloaded.
Probably not many apt users on the list, but worth a try.
Nigel.