I have been annoyed by mutella-0.4.3 segfaults now and then. The -current version has an updated port. The new version 0.4.5 has a bug though. Pressing tab at the command line (which used to bring up a list of available commands) made it segfault. This was due to an off by one error and got fixed in the debian package. This is where I got the patch from. I am not sure about -currents patch (will check soon). grab the port here.
Enjoy!