http://bugs.winehq.org/show_bug.cgi?id=24774
Summary: Unknown Proto IPPROTO_IPV6 Product: Wine Version: 1.3.4 Platform: x86 OS/Version: Linux Status: UNCONFIRMED Severity: normal Priority: P2 Component: winsock AssignedTo: wine-bugs@winehq.org ReportedBy: gregm@gxsnmp.org
On startup of any application via wine the following is sent to the console: fixme:winsock:WS_setsockopt Unknown IPPROTO_IP optname 0x00000013
Yes this host has a working IPv6 enabled connection.