All reports of maintainer-script-should-not-use-deprecated-chown-usage for the archive. The extended description of this tag is:
chown user.group is called in one of the maintainer scripts. The correct syntax is chown user:group. Using "." as a separator is still supported by the GNU tools, but it will fail as soon as a system uses the "." in user or group names.
Refer to the chown(1) manual page for details.
This tag has not been emitted in any package tested by Lintian.