Bugs that are reported via IRC are not notified to webkit-unassigned mailing list. Comments and patches uploaded in those bugs are also not notified. For instance, https://bugs.webkit.org/show_bug.cgi?id=99241 was reported via IRC, but was never sent to webkit-unassigned. I'm not sure if this is intended behavior, but IMHO I think those bugs should also be reported to webkit-unassigned.
That's probably because they are already assigned to someone when they are created.
(In reply to comment #1) > That's probably because they are already assigned to someone when they are created. oops. You're right! Sorry for the noise.