about installing packages

[Martin J Hooper]

Derek Broughton wrote:
> _What_ is the default configuration?  There's no clear reason why some
> packages show an ubuntu icon and others don't.  There's no obvious
> documentation to suggest even what that icon means.

Those Ubuntu icons mean that the package has come from the main repo.

That has bugged me when using synaptic too.  I would like to know what 
repo each package comes from...