Redmine

Hi,
I have upgraded redmine from version 0.8.0 to 0.9.3 (Postgres). Everything seems to be working fine, except the Wiki export feature (HTML and TXT).
When I click on the export link, I get the same HTML page where I am on the Wiki (without the Content-Disposition HTTP header). The behavior is the same for HTML export and TXT export.
Any hint for this problem?

Thanks for your time and help.
Best regards,
Victor