I am getting an HTTP error while uploading an image using the flash uploader, for all users except the admin user. The error is occuring even with users that have administrative priviledges.
Since the admin user does not get an error I doubt is would be a directory security issue - nevertheless I recusively chmoded the uploads directory to 777.
To make things even more strange, I have another blog, using the same plugins and template (through symbolic links) where all authors can upload new images.
The files from both blogs are identical, except for the wp-config that contains different DB and language settings. The blog giving the error in set to fr_FR i18n.
Any help would be greatly appreciated.