400 bad request

[snacktime]

Is there a way to force nginx to log 400 errors?  At least then I could debug this better. It's been difficult to find specific triggers.  The one common trigger is that it only happens in a facebook connect iframe.   We have a situation where two facebook connect iframes are loaded from our domain on the same page, and that triggers it around 80% of the time.  My best guess at this point is that it's a bug with cookie headers.  

chris

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,2757,2789#msg-2789