This thread seems to discuss the same issue. I'd recommend submitting a problem report to Intel Premier Support and attaching a ZIP of the C and Fortran projects. That the behavior changed between 10.1 and 11.0 is not good.
Yes, I saw that there are others having the same problem. I have uploaded a small testcase to Premier support and got the response "Investigation" .But I saw in the above thread that there is a "workaround" (writing to unit=0 instead). I have not got any feedback from support. What timeframe are we talking about until this is fixed ?
/Lars