1. Edit a document in bluefish (app-editors/bluefish-1.0), and then save it. 2. Undo some changes 3. Close the document or program. Bluefish will close without asking if you want to save the altered document. Instead, Bluefish should display the "Do you want to save?" dialog box.
This is not really a gentoo bug. I've reported it to the upstream devs: http://bugzilla.gnome.org/show_bug.cgi?id=327432