Release Notes: This release fix the --stdin option (assume -f when reading from stdin) and other minor issues.
Release Notes: Memory is now used instead of temporary files during optimization. Support for reading input from stdin (and sending output to stdout) was added. There were other minor enhancements and fixes.
Release Notes: Many minor fixes and enhancements, including XMP marker support.
Release Notes: Support for progressive JPEGs has been added (fixes a long standing "bug" of progressive JPEGs becoming non-progressive during optimization). New options --all-normal and --all-progressive for converting JPEGs to non-progressive and progressive. A new -S / --size option to set the target size for the output file.
Release Notes: Safer temp file handling (if mkstemps() is available, and a patch to make "quiet mode" (-q) be quiet.
Release Notes: The -T/--threshold option was added to set the minimum optimization gain needed before a file is optimized. The default is to optimize if gain is even just one byte. Some minor fixes were also done.
Release Notes: Additional support was added for IPTC and ICC markers. Minor fixes were made.