Just noticed an issue, probably not directly related to lammps.
If you download lammps with Chrome/Chromium browser from sandia site, it will be a regular tar archive (not gzipped):
lammps.tar.gz: POSIX tar archive (GNU)
This is a bug in Chrome/Chromium browser: it automatically unzip *.tar.gz files with a ‘content-encoding: gzip’ header.
It is a little bit annoying, especially with a slow internet. Of course, this is not a real problem as one can always use ‘wget’ or another web browser. But may be warning message should be added to the download page.