Error about openMP is happend but I don't use openMP.

Hi.
I have some problem.

Error Message:

OMP: Error #178: Function pthread_key_delete failed:

OMP: System error #22: Invalid argument

When I execute a code after compiling with IPP and QtCore Library,
Error message is printed like above.
This Error isn't happend on Fedora 9 where compiler version is lower than 4.6.0.

My code is : int main(){} ///// a.cpp.
This code was built like following:
g++ -o a a.cpp -lQtCore -lippi -L/lib -pthread.

ippi is supported by IPP7.0 and QtCore is supported by QT 4.7.
I compile a.cpp by using gcc 4.6.0 on Fedora 15.

If I remove either QtCore or ippi, Error Message is not printed