I recently started levelling Mining on my hunter alt, and found that though I had Cartographer_Mining enabled, it wasn't picking up any of the nodes I was mining. This happened with Cartographer_herbalism on my Shaman too, and so I decided to do some testing. I eventually found that what was causing this problem was Cowtip, as with it enabled none of the nodes registered, and without it enabled they were picked up just fine. I've switched to TinyTip for now, which doesn't cause the same conflict, but I hope this can be fixed!
Cartographer - Cowtip conflict?