Emails open as a blank screen?

I have setup Gmail and the email list works perfectly, however, when I open an email I get a mostly blank screen i.e. only the menus at the top are visible, the bottom 3/4 of the window is black.

After checking and resaving settings and restarting Apache, I can now open emails. However, opened emails do not match the ones selected…

Okay, I had the Inbox folder set to “All Mail”. I have changed this setting to “INBOX” and emails now open correctly.