Defunct processes left behind for screen and firefox

["Ciprian Dorin, Craciun" <ciprian.craciun@xxxxxxxxx>]

    Hello all!

    I'm having the following issue: after opening and closing some
shells within the same screen session, I'm left with a bunch of
defunct bash processes, that screen doesn't seem to wait for... Is
there any issue with screen?

    Or is there any issue in general, as Firefox plugin FireGPG seems
to do the same with gpg. (Which it didn't on Debian.)

    Thanks,
    Ciprian.