Problem resolving url

I encountered a strange problem resolving the url of a repository.
I am running opensuse 12.1 and firefox.
The repository of opensuse I want to browse is
however I am told that it does not exist.
When I surf to
avr is shown but I also get a link does not exist when I click on it.
However it works from another computer (windows).
Any ideas?

Mentor
Try: Flush the DNS cache on the ubuntu box & windows. Somebody is out of sync. Is the DNS server local?

Code:
sudo /etc/init.d/dns-clean restart

windoze: from cmd.exe window --
Code:
ipconfig /flushdns

Do you get a 404 error? Usually the system will tell you it cannot connect to the site. Meaning it does resolve but the physical server is not responding.

I tried out a couple of things in the meanwhile, including restarting both the router and the computer.
First, the url is correctly resolved when starting the computer under windows.
Under opensuse, when I click on "/avr" on the page