Hi, With recent versions of gzip, including 1.3.13, zdiff appears to be misbehaving. This is on a recent Linux system with Bash-4.0 installed:
$ echo "File1" > file1 $ echo "File2" > file2 $ gzip file1 $ gzip file2 $ zdiff file1.gz file2.gz [no output] If I do the following (which just changes line 111) then things appear to work again: $ sed -i 's/5 -)/5 - >\&3)/' /usr/bin/zdiff $ zdiff file1.gz file2.gz 1c1 < File1 --- > File2 Is this the correct fix, or are we hitting a bug in Bash? Thanks, Matt.