According to this news report, the Finals at BAE GSR were actually contested due to this exact issue:
http://unionleader.com/article.aspx?...d-a4aac9a692ba
We were one of the the teams at BAE with a minibot that always climbed but never triggered the tower properly. We use a common Decora-style light switch on the top with hard physical stops on either side of it to protect the switch from being "crushed" into the plate when it hits the top. Our minibot definitely hits with the required force, but, as mentioned above, we suspect it may be the dwell time at the top that is the issue. The head of robot inspection came by our pits to specifically check our triggering setup on the minibot, and he said they were doing a survey of different triggering systems in an attempt to determine what did and did not work properly.
In any case, I would hope they figure this out quickly and fix it. The article above quotes an official as saying "We don't do video review here", but maybe that's something FIRST should actually consider.