Not automatically recieving email

Hi,

I've noticed the problem yesterday and today. Email is not automatically appearing. I have to switch folders to see new mail. Seems to be an auto refresh problem. Eg. Looks like no email is there until I switch folder and then all new emails appear.

Its happening on two different machines one running FF 3.6 and the other FF 4.0 beta.

Could you take a look.

Kind Regards

Jon