Comment 5 for bug 174989

I can replicate the problem this way:

If you have a wired connection with a gateway configured to access the internet, just
limit connectivity to internet and you will have a very slow system as you describe above.
This happens to me when I lose connectivity with my ISP provider. There is network but
don't have internet access because of modem connectivity.

Haven't found a solution yet and think that this bug should be marked with a bold red :)