[galaxy-dev] Problem downloading file from local Galaxy

Hi all, I successfully installed a Galaxy instance locally. I use Galaxy with Apache. Every time I try to download a file from history (like Options -> Export to file) the browser (Firefox 3.6) reply with the error "/tmp/lFeL6erm.asc.part could not be saved, because the source file could not be read.". I can correctly view the file content with the "Display data in browser" button. Thank you for any help. --- Marco