It really depends on who you r company is setup. It is really a question of out of sight out of mind. If bugs bubble up from QA without causing your manger heartburn then you aren't in his view | on his mind. When new features go out the door he has some sort of involvement in their release so those devs are in his office | in his head. When new stuff comes up it goes to the guys he can remember.

If your boss was more involved with defects then defect fixers would get more respect.