Thanks for your report. This phenomenon is actually a known issue in amule 2.0.3 (see
this thread). It happens when you have fake servers in your server list.
As a workaround:
Make sure that the follwing options are deactivated (in Preferences->Server): "Auto-update serverlist at startup", "Update serverlist when connecting to a server" and "Update serverlist when a client connects".
Then empty your server list and enter a couple servers from
http://www.gruk.org/list.php. (for now razorback 2 and a few others should be fine)
In less than a week I will hopefully be able to post a new stable amule binary that can automatically import the gruk.org server list.