Hello,
I notice this bug was reported ages ago (http://silverstripe.org/archive/show/2466), but i'm having the same issue.
When I upload jpeg images, and the extension is in uppercase, the image cannot be viewed (403 Forbidden server error)
Did anyone ever find a fix for this?
If i rename the extension of the uploaded file, it works, so i'm thinking it must be a .htaccess / redirect problem or something - not an upload problem?
example
http://silverstripe.northernlightsdesign.co.uk/assets/Uploads/bike2.JPG
http://silverstripe.northernlightsdesign.co.uk/assets/Uploads/bike.jpg