Thanks to everyone who gave me advice on how to fix the brick. I tried everything that was suggested and when nothing worked, I called Lego Education's support center. The tech talked me through a host of different possible fixes. None worked. Now he's sending me a new brick. For now, we're going to change out the brick and then rewrite the program onto a PC laptop that we're borrowing from another team mate. That way, if it is a Mac issue, we'll at least negate that problem. The rogue events have been reduced to about 1 in 7. Still unacceptable, but better than with the Mac. We'll soldier on, but I am thoroughly disgruntled and this will be our first and our final year with FLL unless someone from Lego can assure me that they have take care of all their bugs. It's totally unacceptable that a company can charge the exorbitant amount they do for the NXT kits and then still have these bugs. I fully understand that FLL is about solving problems, however, the problems should be with robot design and programing, NOT faulty equipment. These children have put hours upon hours into this project and I can't say that they've learned as much as I'd have liked. They've learned that the robot ignores the bricks they put in the program whenever it feels like it. They've learned that the brick breaks when you reset it. They've learned that NXT probably doesn't work well with Macs. We are a Mac family and own two NXT kits. Kits that I bought this year for the children. I feel ripped off. There is a very bad taste in my mouth. So, all in all, this is not a good introduction to FLL. Sherene -- To UNSUBSCRIBE or CHANGE your settings, please visit https://listserv.jmu.edu/archives/vadcfll-l.html and select "Join or leave the list". -- VADCFLL administrative announcements are sent via VADCFLL-ADMIN-L. Visit https://listserv.jmu.edu/archives/vadcfll-admin-l.html to subscribe.