Is it a fresh 5.4 install or an update. I updated a 5.3 to 5.4 and it has no silverlight problem.
However uploading images and working with them trows me around a bit.
Sometimes after uploading I am redirected to pages
Someteimes after uploading I see the loading bar forever
Sometimes publishing takes me to upload images
Very inconsistent. Another Screencast www.marktold.com/screencast/sf_image_crazy.swf
So far I should have waited for the hotfix for 5.4 :-/