IDCT. The floating point DCT/IDCT algorithms are mainly a legacy feature, and they do not produce significantly more accuracy than the slow integer algorithms (to put numbers on this, the typical typical difference in PNSR between the two algorithms is less than 0.10 dB, whereas changing the quality level by 1 in the upper range of the quality scale is typically more like a 1.0 dB difference While libjpeg-turbo does emulate the libjpeg v8 API/ABI, under the hood, it is still using the same algorithms as libjpeg v6b, so there are several specific cases in which libjpeg-turbo cannot be expected to

non-existent host-only interface • Storage: fixed possible crashes with VMDK/VHD images with snapshots and async I/O (4.0 regression) • Storage: don’t eject the physical medium if a DVD/CDROM/floppy drive is detached regression; bug #7031) • Storage: fixed hang with images located on filesystems which don’t support async I/O (bug #6905) • Storage: fixed raw disks on Windows hosts (3.2.0 regression; bug #6987) • LsiLogic:

non-existent host-only interface • Storage: fixed possible crashes with VMDK/VHD images with snapshots and async I/O (4.0 regression) • Storage: don’t eject the physical medium if a DVD/CDROM/floppy drive is detached regression; bug #7031) • Storage: fixed hang with images located on filesystems which don’t support async I/O (bug #6905) • Storage: fixed raw disks on Windows hosts (3.2.0 regression; bug #6987) • LsiLogic:

asynchronous I/O. This does not apply to VDI files and raw disk/partition VMDK files, which do support async I/O. This restriction will be lifted in a future maintenance update. 208 13 Known limitations •

regression; bug #7031) • Storage: fixed hang with images located on filesystems which don’t support async I/O (bug #6905) • Storage: fixed raw disks on Windows hosts (3.2.0 regression; bug #6987) • LsiLogic:

regression; bug #7031) • Storage: fixed hang with images located on filesystems which don’t support async I/O (bug #6905) • Storage: fixed raw disks on Windows hosts (3.2.0 regression; bug #6987) • LsiLogic:

CD passthrough for certain media players • Storage: fixed hang in case of unaligned requests and async I/O enabled • Storage: fixed hang with newer VHD images (bug #11279) • VGA: fixed wrong access check

CD passthrough for certain media players • Storage: fixed hang in case of unaligned requests and async I/O enabled • Storage: fixed hang with newer VHD images (bug #11279) • VGA: fixed wrong access check

#10929) • Storage: fixed a release assertion in the AHCI emulation when requests where cancelled with async I/O disabled • Storage: fixed a hang during VM reset under certain circumstances (bug #10898) •

Storage: fixed hang under rare circumstances • Storage: fixed hang in case of unaligned requests and async I/O enabled • Storage: fixed hang with newer VHD images (bug #11279) • VGA: fix for double scan