Not sure about the comment about more bugs - XP Home is almost entirely a subset of XP Pro. I can't think of many things on Home that Pro can't do through installation/configuration changes. About the only significant internal difference is capping on physical CPU count.
I'm pretty sure what is more likely is there is far more copies of XP Home edition on the market. Add to that the exotic/troublesome combinations of hardware that home users have vs. the more conservative/conformant corporate hardware. You're far more likely to see more problems/bugs in conjunction with Home than Pro.