I'm using Cam Studio 2.5 Beta too, it works fine for me for grabbing the screen while recording my voice.
Combine it with a little brilliant software called 'Sizer' that allows you to make the program window a specific size (like Youtube HD 1280x720) and you can make accurate videos of the program window with no cropping or moving after recording.
I produce the videos in Sony Vegas Movie Studio Platinum 9, a great piece of software at a reasonable price. It's rock solid, pretty fast and has never crashed on me.
JimR
Bookmarks