This release is small but important. Certain filters on Microsoft Windows platforms were showing stripes on the images after using filters. This is due to the way OpenMP was introduced for Linux but this change way back then didn’t accommodate very well to the packaging of GraphicsMagick on Windows which was already built using the OpenMP flags.
Now we only use that OpenMP code for Linux platforms because GraphicsMagick seems to be the single threaded build by default in Linux package managers.