Hi,
I already posted on the bug report here https://support.ellislab.com/bugs/detail/16322/#12923
Not sure if this is used for support or not so I wanted to post in the official support forum.
Attaching also a screenshot and here again is my issue which I think might somehow be related to the actual bug report.
I have a similar issue. Everything works for the superadmin, but for my ‘admin’ users (which essentially have almost same rights as super admin) the upload window comes up for me and I am able to select a file from my computer, (both in an entry with file field, and in the file upload manager) but then, the ‘upload’ button never turns red and i cant click it.
I already applied fix from above.