There's new version 1.3.1.1 of chmsee available upstream http://code.google.com/p/chmsee/issues/detail?id=121 Current in-tree version does not work with xulrunner-2.0 1.3.1.1 fixes this. http://code.google.com/p/chmsee/issues/detail?id=121 Old ebuild still working.
Yes please, especially with gnochm masked for removal in under two weeks.
Fixed.