CGI error for csv export

[sierp]

When I try to export the bug list to csv-Format I get the following error-message. What is the necessary configuaration I have to do?

CGI Error
The specified CGI application misbehaved by not returning a complete set of HTTP headers. The headers it did return are:


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Cache-Control: no-store, no-cache, must-revalidate
Cache-Control: post-check=0, pre-check=0
Pragma: public
Content-type: text/plain; name=WIC.csv;charset=iso-8859-1