This bug is known and fixed upstream, the fix is in version 1.4.
http://git.savannah.gnu.org/cgit/gzip.git/commit/?id=b9e94c93df914bd1d9eec9f150b2e4e00702ae7b
Quoting from the commit:
gzip -d would fail with a CRC error...
...for some inputs, and some memcpy implementations. It is possible that an
offending input has to be compressed "from FAT filesystem (MS-DOS, OS/2, NT)",
since the sole reproducer no longer evokes a CRC error when uncompressed and
recompressed on a GNU/Linux system. Also, using an unpatched
reverse-memcpy-gzip on over 100,000 inputs on a GNU/Linux system did not turn
up another reproducer.
Possibly the (one line) fix can be applied to the current Ubuntu version
as well? I can't help with that as I'm myself unable to reproduce the
problem (on i386 in Virtual Box).
** Changed in: gzip (Ubuntu)
Status: New => Confirmed
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Regression: CRC error an i386
https://bugs.launchpad.net/bugs/524366
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