I’ve taken photos of frosts on the pine tree before (here) but I couldn’t resist. I processed these using ACR instead of directly in Photoshop.
I was having problems using the Polygonal Lasso Tool with the Wacom Bamboo pen. Initially I thought it was because the pen tip was wearing out. I switched it (in the photo, the one on the right is the old one), but it’s still not working correctly. I’m starting to think it’s the tablet and not the pen.