[Tobago] tc:validateFileItem useless with Firefox

[Helmut Swaczinna]

Hi,

the tc:validateFileItem tag doesn't work anymore with newer versions of 
Firefox (for example 2.0.0.6).
Firefox always sends MIMI-Type application/force-download for uploaded 
files. IE sends the correct
MIMI-Type. Why has Firefox such ugly behavior? Is it possible to determine 
the MIMI-Type on server side?

Regards
Helmut