Question about Apache 2.0.46 and "hung" threads

Ok, I'm running Apache 2.0.46 on RedHat Linux 9 with the "worker" MPM
configured. I've also got MySQL 4.0.14 running on the box and
PHP-4.3.2 configured. I run a PHP-based message forum on the site
(primarily) and have been noticing something "strange" in the
"server-status" output. There are two threads that seem to be "hung":

.........................W........................ ...............
........W......................................... ...............
____K______________K__K__......................... ..............
.................................................. ...............
_____K______________K____......................... ..............
___KR__K___W___________KK......................... ..............
.................................................. ...............
.................................................. ...............
.................................................. ...............
.................................................. ...............
.................................................. ...............
.................................................. ...............
.................................................. ...............
.................................................. ...............
.................................................. ...............
.................................................. ...............

The two "W"s in the first two lines are what I'm referring to. Since
the process that owned those threads is apparently "gone", I'm not
sure why those threads are still lingering around. I would imagine
issuing an "apachectl restart" vs an "apachectl graceful" would cause
those threads to die and release whatever resources they might have.

I also notice my system load is higher than usual and I'm trying to
determine what the best course of action would be to deal with
situations like this. Would a nightly "apacehctl restart" be a good
preventative measure? Right now, I have a weekly "apachectl graceful"
scheduled to run. I'm concerned these threads are also holding on to
MySQL connections which is leading to other problems.

Any ideas or advice would be greatly appreciated. :)

Thanks in advance...

Peace...

Tom