Hi,
I can use the browser uploader instead of the flash version. Problem occurs when you insert the image into the post / page. The image needs to be referenced manually (as the media buttons also do not work).
I am using Safari 5.1. I decided to download Firefox 7.0.1 and found that everything worked fine. I think this might be a browser compatibility issue rather than missing / corrupt files.
I just can’t work out why it is only affecting one of our sites. Have tried disabling all of the plugins for that instance and saw no improvement.
So for now – I have been using firefox as a work around whilst writing content.
Kris