Solution
Please Install the Updated Packages.
Insight
Webmin would always fail the login if the user's password contained UTF-8 non-ascii characters.
This update corrects the issue.
Affected
webmin on Mandriva Linux 2007.0,
Mandriva Linux 2007.0/X86_64,
Mandriva Linux 2007.1,
Mandriva Linux 2007.1/X86_64,
Mandriva Linux 2008.0,
Mandriva Linux 2008.0/X86_64