[htdig] internal server error

[htdig <ht...@ac...>]

I suddenly after a month use, recive an 'Internal Server Error' when I
search our site.
The only clue I can finde is this from the httpd/error_log:

Unknown char in line 170: \Unknown char in line 171: -Unknown char in line
171: >[Tue Jul 30 09:48:05 2002] [error] [client 195.192.9.24] malformed
header from script. Bad header=parse error:
/usr/local/apache/httpd/cgi-bin/htsearch.cgi

(I have renamed htsearch to htsearch.cgi, a month ago.)
I'm not aware of any changes short before this error.

Any suggestions?

finn