I'm not sure if its a bug or me being stupid but sometimes (quite a lot) I get an email with an embedded image. The image is blocked, and shown as a red block, but there is no way to enable it (the 'show images' option at the top is missing completely). 

I have played around with the 'Display remote images' and 'Display attached images below the message' options but no combination seems to help.

The only way to see the image is to Forward the mail. Which I discovered by accident, but when in the 'forward' window, the image is displayed. This also doesn't work with 'reply'.

Thanks

Steve