Please check logging message from Http (info severity ).
var/log/http/2011/03/http-2011-03-03.log.gz:2011:03:03-20:14:25 ******* httpproxy[8535]: id="0003" severity="info" sys="SecureWeb" sub="http" request="0xa134540" function="fileextension_scan" file="fileextensionscanner.c" line="130" message="error converting file name to utf-8 from utf-8: Invalid byte sequence in conversion input"
/var/log/http.log:2011:03:04-15:30:56 ******* httpproxy[8535]: id="0003" severity="info" sys="SecureWeb" sub="http" request="0xeb351bc0" function="fileextension_scan" file="fileextensionscanner.c" line="130" message="error converting file name to utf-8 from utf-8: Invalid byte sequence in conversion input"
/var/log/http.log:2011:03:04-15:31:00 ******* httpproxy[8535]: id="0003" severity="info" sys="SecureWeb" sub="http" request="0xe29fc158" function="fileextension_scan" file="fileextensionscanner.c" line="130" message="error converting file name to utf-8 from UTF-8: Invalid byte sequence in conversion input"
/var/log/http.log:2011:03:04-15:31:20 ******* httpproxy[8535]: id="0003" severity="info" sys="SecureWeb" sub="http" request="0xeb35c770" function="fileextension_scan" file="fileextensionscanner.c" line="130" message="error converting file name to utf-8 from UTF-8: Invalid byte sequence in conversion input"
Why is trying to convert utf-8 to utf-8?
