Upload New Media – New error!

Hallo,
I have an Upload New Media problem that is not shown in the sticky topic.

When I work at my mac the Upload New Media function does not work, more exactly it doesn’t load the ‘UPLOAD’ button to open the finder window.

1 – I tried severel browsers including Firefox, Crome, Safari, Opera, Camino etc

2 – I tried uninstalling over and over again, step by step and nothing. (the same thing happens with my other blogs, so its not a one website problems)

3 – Tried with latest flash – noflash bla bla

4 – deactiveted/deleted all my plugins

However it works when I go to my PC with Windows

How could I resolve this?
Please help me!