[squid-users] Complaints about method "M-POST"?

Today I noticed the following entries in Squid's (v2.4S7) cache.log:

2002/08/26 13:09:59| parseHttpRequest: Unsupported method 'M-POST'
2002/08/26 13:09:59| clientReadRequest: FD 20 Invalid Request
2002/08/26 13:16:45| parseHttpRequest: Unsupported method 'M-POST'
2002/08/26 13:16:45| clientReadRequest: FD 20 Invalid Request
2002/08/26 15:58:18| parseHttpRequest: Unsupported method 'M-POST'
2002/08/26 15:58:18| clientReadRequest: FD 20 Invalid Request

Huh? What is "method M-POST" and why is this a cause to note invalid
requests?

Thanks.
Received on Wed Aug 28 2002 - 07:29:20 MDT