cannot install with apt-get

[Joe Hart]

> That's a repo for a single package? It'd be maddening to configure a
> repo for every package that one must install. And as soon as I removed
> the lines corresponding to the cdrom, it installed fine from the web.
It is indeed a pain.  KDE 3.5.3 is also like that.  You installed amarok 
from the regular repository.  Most likely you have 1.3, not 1.4.  The 
new version adds features, but it also has bugs.  That's probably the 
reason it isn't in the main repository.

One of the things that will help keep your system current is to enable 
the backports repository.  If you do that, all your installed 
applications will be updated (when you do an update) to the newest 
version that is available for (k)ubuntu.  Keep in mind however that some 
of the new packages can break your system.  That's why they're in a 
different repository.