216.24.199.zz - - [22/May/2012:17:09:28 +0100] "GET /MySub/MuSub-sub/MyPage.html HTTP/1.0" 200 37093 "http://example.com/MySub/MuSub-sub/MyPage.html" "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322) Babya Discoverer 8.0:"
Note malformed UA and trailing space near end and prior to version number.
There's an old thread on Babya Discoverer [webmasterworld.com], which is claimed to be a browser. Freely downloadable.
There's a 2009 heads up by keyplr on another IP from this host [webmasterworld.com]