Microsoft-WebDAV-MiniRedir

Jeg fandt lige denne linie i min apache log og har ikke den fjernest idé om hvad det betyder....
<snip 1>
Microsoft-WebDAV-MiniRedir
</snip1>

<snip2>
"GET /_vti_bin/owssvr.dll?UL=1&ACT=4&BUILD=2614&STRMVER=4&CAPREQ=0 HTTP/1.1" 404 772
"GET /_vti_bin/owssvr.dll?UL=1&ACT=4&BUILD=2614&STRMVER=4&CAPREQ=0 HTTP/1.1" 404 772 "-" "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)"
"GET /MSOffice/cltreq.asp?UL=1&ACT=4&BUILD=2614&STRMVER=4&CAPREQ=0 HTTP/1.1" 404 772
"GET /MSOffice/cltreq.asp?UL=1&ACT=4&BUILD=2614&STRMVER=4&CAPREQ=0 HTTP/1.1" 404 772 "-" "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)"
</snip2>