mozilla-firebird ebuilds depend on both ORBit ( glib1 ) and libIDL ( glib2 ). The mozilla ebuilds had this issue before but it was fixed by adding a depenency on ORBit if gtk was in USE and libIDL if gtk2 was in USE. Reproducible: Always Steps to Reproduce:
thanks, I've fixed this in mozilla-firefox-0.8-r1