[EricH]

I'm going to go with the belay points for #1 as well. I seem to remember a few trailer hitch (and flag holder, for those of you who were around 2006-2008) quick builds--despite those items being required in the rules from day 1.

#2 will be, yet again, bumper issues. Not necessarily the "non-spec bumper" variety, but the "bumper not on perimeter" variety.

#3: contact with a robot in a protected zone. This isn't #1 because it will largely disappear after Day 1 of any given event, and greatly diminish after Week 2, as teams figure out just how bad the penalty is and how to avoid it by playing smart defense.