[Oisf-users] Strange log lines in http.log

[Travel Factory S.r.l.]

Hi,
I found a lot of these log lines:
03/02/2012-09:55:29.010948 <hostname unknown> [**] 
\xC0\x11\xC0\x13\x00E\x00D\x003\x002\xC0 [**] <useragent unknown> [**] 
user_ip:3965 -> proxy_ip:8080

Matching http.log and proxy logs, they probably are https requests to 
the proxy.

It seems that my suricata doesn't understand them... is it a setting ? 
or a compile time switch ?

Thanks