А зачем вообще использовать Intel C++ Compiler?
Qt 4 has been tested successfully with:
Windows - Intel(R) C++ Compiler for 32-bit applications, Version 8.1 Build 20050309Z Package ID: W_CC_PC_8.1.026
Altix - Intel(R) C++ Itanium(R) Compiler for Itanium(R)-based applications Version 8.1 Build 20050406 Package ID: l_cc_pc_8.1.030
We currently only test the Intel compiler on 32-bit Windows versions.
Значит попробуйте версию 8.1