Oops, looks like in this case Zeno's link wasn't for Gammon's, but it was Zeno's link.
Back on December 27, 2005, Zeno posted to 10 C Programming Questions: Long Winded Post
Unfortunately, to the best of my knowledge, MudDomain closed down permanently about 6-12 months ago, so the link's probably not any good anymore, which would explain why Zeno didn't jump in to post it for you. Sorry for the false alarm.
Oh, wait, maybe this one's more useful/helpful, back on March 9, 2009, Zeno posted to Help Crashing
At the very least, it's a much more recent link from him and sounds somewhat more promising, though I can't say that I've ever understood valgrind very well, even with reference to the docs.
Sadly enough, a quick search of this site's forum posts doesn't seem to have anything better than that to offer for you, but hopefully it's enough.