I also have similar problems just like baboo. The difference is, I`m living in a campus like facility (30 rooms) and I think I`m connected trough router. Pardus firewall is also on with no exceptions.
When I try to install/update/uninstall any package the progress box just dissapears afer a couple of seconds and nothing happens.
My other computer at home, does not have that kind of problems at all and works perfectly, but there is no router involved.
I solved most of applications issues by compiling applications from source. The only thing that is giving me trouble is amsn, I use kopete instead but I still prefer amsn.
pingo@pingvinmaschin ~ $ pisi lr
pingo@pingvinmaschin ~ $ cat /etc/resolv.conf
pingo@pingvinmaschin ~ $
Any help is appreciated