Not sure if anyone mentioned this but...

The mail client is REALLY bad when there is a lot of images in the email. It constantly flickers and goes back to the top of the email everytime it finishes loading 1 image. Then that repeats for every image.

My work requires emails with lots of little screenshots quite often. This makes the N9 mail client really really annoying. Even Symbian client such as on N8/E7/X7 is much better in this regard. I hope this is addressed in future update....