Qt 4.2.1 is a bug-fix release. It maintains both forward and backward compatibility (source and binary) with Qt 4.2.0. The Qt version 4.2 series is binary compatible with the 4.1.x and 4.0.x series. Applications compiled for 4.0 or 4.1 will continue to run with 4.2. **************************************************************************** * General * **************************************************************************** - QImage Fixed a potential security issue which could arise when transforming images from untrusted sources.