I just installed Opera mail on both my Win 8 laptop and Win 7 desktop. No problems with laptop.
My desktop is currently running Opera 12.16 and I needed to install mail before update because the mail has been removed from new opera. It imported all my old mail and setting from Opera browser but it wont let me enable HTML. All my emails are stretched over the width of the screen and in plain text.
Settings 'wrench' does not display same options as it does in Win 8, and there is no option to uncheck "prefer plain text"
very frustrating