The remote host is running the Opera web browser.
Versions of Opera earlier than 11.51 are potentially affected by multiple vulnerabilities :
Unsecured web content could appear secure. (Issue 1000)
An unspecified issue.
Binary data 800858.prm
.opera.com/docs/changelogs/windows/1151
.opera.com/support/kb/view/1000
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-3388
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-3389