After installing version 3.6.9 of Firefox I am no longer able to embed Youtube videos.
I had to move to Opera 10.61 to do it.
If I let them know about a problem with a browser I expect them to fix it without having to put a question mark in the post.
Just for a test, I put in this video using Firefox:
Big white box for me...
Firefox 3.6.9 introduced some security changes which have caused issues with all in-browser WYSIWYG editors. We've been investigating workarounds for several days, and are aiming to include a solution in the upcoming release.
Does not seem to be limited to Firefox.
I only seem to get a white box when embedding YouTube videos using Camino as well.
That's because Camino is firefox.... or at least it uses the same engine.