No subject

like would not have been displayed at all since the mime-type is
something different than "text". However, it still would be interesting,
where to search for the origin of this behaviour.

One should find the "hint" at the beginning of the binary data of the
image output - some warning or newlines/spaces...

Cheers,
Olly
-- 
Oliver Hader
TYPO3 CMS Core Team Leader

TYPO3 .... inspiring people to share!
Get involved: http://typo3.org