I had an error trying to knit some surfaces and saw the new inteface in 2010, sp2 for the first time. One of the suggestions in the error message was to uncheck verification on rebuild. I usually run with this checked, but I tried it. My surfaces did indeed knit. However about 30 minutes later I saw that they shouldn't have because I had created something incorrectly. If it had refused to knit originally, then I would have been forced to go back and find my mistake right away. Be careful that you are really getting what you want when you force the system to knit your surfaces this way.