That's so funny, I just got the automated message from Moz to say this forum thread has been updated (from you Roeesa), and I thought "Oh yeah, that Outlook freeze thing". In the meantime,I had clicked on the message, and Outlook instantly froze!
So I would say the issue is NOT fixed!
I use Outlook 2013 now, so the issue is the same as it was in Outlook 2010 (probably same base-code?)
Luckily this time I left Outlook alone for 45 seconds, and eventually it loaded the content of the e-mail.
So there must still be some image, code or script etc. that is causing that issue.
Rich