I was browsing the Faqs, Howto, Tips & Tricks forum on ubuntuforums.org and came across a script to automatically compile the beta versions of Tcl and Tk and then recompile amsn with anti-aliasing support.
I knew this has been possible, but I wasnt really interested in putting the work in to have more buggy beta software running. But since I found this script and it seemed to be working flawlessly for a lot of people I gave it a try.
See the forum post here: Automatic Script for Anti-Aliasing aMSN
Read the notes in the post before you try to run the script. There are some conditions that may affect some users. It worked fine for me though.
Here are my before and after pictures:
I haven’t had any stability issues either.