New --zmax=NUM option to be used with -z (--decompress) to search compressed files and archives recursively stored within tar/zip/cpio/pax archives for up to NUM recursive expansion levels deep. (Directory trees in archives are already recursively traversed and do not require --zmax.) The --zmax argument may range from 1 (default) to 99 for up to 99 recursive decompression and de-archiving steps. Improved option -U to be used for backward compatibility with GNU/BSD grep by no longer flagging invalid UTF as "binary files". More to come soon!