HTTP/1.1 Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+6.0;+.NET+CLR+1.2.30703)
HTTP/1.1 Mozilla/5.0+(Windows;+U;+Windows+NT+6.0;+en-US;+rv:1.5)+Gecko/20031007+Firebird/0.7
I knew it wouldn't take long before this started showing up.