help with internal server error

I have written some cl-http code that works fine with browsers like 
Mac Netscape 4.75, but when I try it with other browsers (e.g. Mac 
Netscape 7, which I believe is based on Mozilla), I get the following 
error:

Internal Server Error

<P><B>Request: </B>GET /pql/outline?open+specializations+8390 HTTP/1.1</P>
<P><B>Error: </B>No = delimiter found in the equal sign delimited pair, 300</P>

CL-HTTP/70.23 (Macintosh Common Lisp; 3.7.0)

I am guessing this problem, presumably involving differences in how 
the html is parsed or interpreted by the browsers, is well-known. 
Could someone clue me in on on how to fix it?

     Thanks,

	Mark Klein

-- 
Mark Klein, PhD
Principal Research Scientist
Massachusetts Institute of Technology, NE20-336
Cambridge MA 02142 USA

Tel: +1 (617) 253-6796
Fax: +1 (617) 452-3231

[email protected]
http://ccs.mit.edu/klein/