I just started using the Embed Code Generator plugin and I noticed that when someone hover the mouse over the embed box, a red "forbidden action" icon appears.
I found out that the Twitter Bootstrap for WordPress plugin I use on my blog is responsible for this. I deactivated it and the red icon disappeared. But I don't want to keep it deactivated.
Check this post out to see what it happens with TBW activated:
Any ideas to fix this?