Recently I've noticed my code failing to compile because Intel Composer does not know anything about the nullptr or nullptr_t type which was introduced into Visual Studio 2010 as a C++0x language feature.
For now i fixed it by defining nullptr=0 as a preprocessor macro but this isn't ideal.
I would like to see my code compile with icc as it is.
Microsoft is also using the nullptr type in their version of STL in combination with the perfect forwarding feature which passes parameter as they are to another function. And as long people use NULL to initialize pointers the result is wrong because NULL == 0 which is an int and therefor not deduced to the same type.
Changing the /Qstd=c++0x flag does not change the compiler behavior.
P.S. I have tested with Composer 2011 Beta update 2