Originally Posted by
The Stig
Sounds like 1 e-mail is causing it to delay; it might be trying to load an image, or contact something external. Did it recently start happening? (I assume so)
It's a shame google took away the ability to file e-mails to a folder, otherwise I would suggest moving everything off the inbox and see if the problem goes away.
Can try to move your recent e-mails into the bin and see if that helps, then restore it and go through your mails 1 by 1 to see what might be causing a hang.