By the way, could the problem be that SeaMonkey 2.0.4 is designed for xulrunner 1.9.1.9 and that xulrunner version installed on Ubuntu 10.04 is 1.9.2.3 (which is the one used by Firefox 3.6.3)?
If so, SeaMonkey 2.0.5 will fix this if it uses the same xulrunner version as next Firefox (since they will be released simultaneously).
By the way, could the problem be that SeaMonkey 2.0.4 is designed for xulrunner 1.9.1.9 and that xulrunner version installed on Ubuntu 10.04 is 1.9.2.3 (which is the one used by Firefox 3.6.3)?
If so, SeaMonkey 2.0.5 will fix this if it uses the same xulrunner version as next Firefox (since they will be released simultaneously).