Hi, I've run into a multiply defined TIFFOpenW symbol when linking against ITK and Qt TiffIO plugin. ITK mangles a lot of libtiff symbols in Utilities/itktiff/itk_tiff_mangle.h, but not TIFFOpenW. I think this should be added to Utilities/itktiff/itk_tiff_mangle.h #define TIFFOpenW itk_TIFFOpenW Paul