[TYPO3-english] filetype/mime in typo3 backend?

[cuythoven]

Hello,

When I uypload a zip file in the backend, it has the Mime filetype 
Application/zip

If you download and open this zip with internet explorer, the file is 
corrupted. Firefox etc can handle the zip ok.

In a previous typo3 version, my zip file were uploaded as 
/application/octet-stream

When you open this zip with internet explorer, everything is perfect. My 
old uploads are therefor fine, and I can download them perfectly.

I'm not sure if typo3 is responsible for this change in filetype, but I 
do not know how to use the correct filetype.

I tried htaccess (AddType application/octet-stream .zip)
and the constants in tt_content, but nothing worked.

Does anyone know how to handle this?

Regards,

Christiaan Uythoven