@Eirik, what kind of mail server? You could try using an older version to store your password. Note that if using an older version, you may have to rebuild your msf files. Right click on folder and choose properties-->repair folder.
@Roderick, first try to set MOZ_NO_RWS=1 in your environment and see if that fixes.
I also forgot to package the README.OS2, it is the same as in the current Firefox and SeaMonkey.