Suddenly today, my mail no longer shows embedded images - I used to get boxes which could be activated through the actions command just above the message, but this no longer works. I have no idea what might have caused such a change overnight.
There are a number of threads asking this question but they don't help, in several cases because there have been no replies. The best looking suggestion was go to View/display attachments online. This is checked but I still have the problem.