I tried to connect to a new server using 1.8.0 from the Fedora repositories. It gives me:
$ rdesktop 10.0.64.165
Autoselected keyboard map en-us
ERROR: CredSSP: Initialize failed, do you have correct kerberos tgt initialized ?
Failed to connect, CredSSP required by server.
Then I found bug260 [ http://sourceforge.net/p/rdesktop/bugs/360/ ], got the sources for 1.6.0 and 1.8.0, but couldn't apply the patch. It didn't work on trunk either. The changes to iso.c fail.
What can I do?