We had a similar problem to this one with our 2011 robot where the tubing would overheat and fail. We found this only occurred during demos following that competition season (it never actually happened at a competition), but nonetheless it got to be quite annoying to have to put a new piece of tubing on every few minutes.
Eventually we mounted one of the kit computer fans so it blew across the compressor, and the change in temperature was drastic.
We did tests and generated a chart based on the results:
https://docs.google.com/spreadsheet/ccc?key=0AqQx991m_YKGdEc3OV9NbG10YmluNjM2UFRhYV9Gb lE&usp=sharing
Long story short, if you can use a fan to cool your compressor, do it.