[squid-users] strange lines in cache.log

Our Squid has long been constantly putting some strange lines in cache.log:

2007/06/12 11:15:45| parseHttpRequest: Requestheader contains NULL
characters
2007/06/12 11:15:45| parseHttpRequest: Unsupported method '^C'
2007/06/12 11:15:45| clientReadRequest: FD 930 (x.x.x.x:2649) Invalid
Request
2007/06/12 11:15:45| parseHttpRequest: Requestheader contains NULL
characters
2007/06/12 11:15:45| parseHttpRequest: Unsupported method '^C'
2007/06/12 11:15:45| clientReadRequest: FD 145 (x.x.x.x:62332) Invalid
Request
2007/06/12 11:15:48| parseHttpRequest: Requestheader contains NULL
characters
2007/06/12 11:15:48| parseHttpRequest: Unsupported method '^C'
2007/06/12 11:15:48| clientReadRequest: FD 1611 (x.x.x.x:60853) Invalid
Request
2007/06/12 11:15:49| parseHttpRequest: Requestheader contains NULL
characters
2007/06/12 11:15:49| parseHttpRequest: Unsupported method '^C'

ad nauseum (the IP addresses need not be the same) at a rate of 30-40
megs a day. Does someone know what the reason could be, even if it's
unrelated to Squid (I'm not sure)? Thanks.
Received on Tue Jun 12 2007 - 00:21:41 MDT