Hi, With the new warning patch, -Wlong-long flag is causing many warnings with GCC 4.6: .../ITK/Modules/Core/Common/src/itkNumericTraits.cxx:70:71: warning: use of C++0x long long integer constant [-Wlong-long] What is the right thing to do here? Disable the warning (-Wno-long-long)? Remove the long long? Matt