There will be a number of packages that SeaMonkey will no longer need after its switch to toolkit, that should also be added to the removal lists for the installers. I'm filing this bug now so we don't forget about it, obviously we can't resolve it until after the switch to toolkit.

This bug is no longer valid - on Windows we created a new installer based on the NSIS installer (bug 351917) which has had its own package list heavily revised and updated. On Linux the package file was also reworked to only include the required files (bug 395535).