According to the official changelog, VLC 2.1.5 fixes compilation issues on the OS/2 operating system, adds various stability improvements for the QTSound capture module, no longer renames MP3 converted files to .raw, increases the buffer size, and fixes channel ordering issues on Mac OS X audio output. Moreover, it fixes DxVA2 decoding of samples that require more surfaces, improves MAD (MPEG Audio Decoder) resistance to damaged MP3 streams, fixes PGS subtitles alignment in MKV files, and repairs transcode issues that appeared when the audio format was changed.