apache access question

Mon May 17 11:49:56 PDT 2004

Anyone know the meaning of this junk in my access.log?

216.252.226.94 - - [26/Jul/2003:07:34:28 -0700] "GET 
/default.ida?XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XX%u9090%u6858%ucbd3%u7801%u9090%u6858%ucbd3%u7801%u9090%u6858%ucbd3%u7801%u9090%u9090%u8190%u00
c3%u0003%u8b00%u531b%u53ff%u0078%u0000%u00=a  HTTP/1.0" 404 286

$ whois 216.252.226.94
InterPacket Group Inc INTERPACKET3 (NET-216-252-128-0-1)
                                 216.252.128.0 - 216.252.255.255
ICCnet IPG3-226-0-20000608 (NET-216-252-226-0-1)
                                 216.252.226.0 - 216.252.226.255