Wow, didn't know it was so controversial! Thanks for everybody's thoughts. Most of the debate has covered my dilemma. FWIW the reason I got into this mess was having called a raise on the button I had to fold post-flop, leaving me with about 8BBs. Then there was a long series of big bets before me which meant I had to keep folding. 20 min levels meant I was suddenly down to the 4BBs because of the increase in blinds. And my question was meant to be very specific about
calling as opposed to being first to act and shoving (I have no probs with that at all). I know what you mean about not letting it happen and I can honestly say that it happens very rarely and usually because I lost a big pot. The key advice I take from this is: 1. Nick's point about setting the definition of "very short stack" higher in MTTs which is really helpful. 2. Calling after a raise can be ok if I think the raise (rather than my action) will make the players still to act fold. Afterall this is no different than being called by one other player because position is meaningless once you are all in.
So thanks for the effort guys (except for Dan who referred to me as "he" when most people know I'm a "she"

)