There are file maps for different areas with different permissions. Every area has it's own content manager who has permissions to upload in their own file map.
In some browsers people can upload the files in their own map where they have the permissions for, but in other browsers they can't. Then if they choose upload, the upload screen pops up, but the 'choose file' button is grey.
Is there anything we can do about that to make it work in every browser?