It seems it's not a rare thing in blogger. After hearing about it I found this from blogger...
"We're investigating reports of users not being able to comment on IE8/9 from the embedded form. We hope to have a fix out shortly, but in the meantime we encourage admins to switch to either the full-page or pop-up forms which should be working without issue."
That being the case I've altered my settings to have commenting appear as a full-page. Please let me know if this has helped if you've been having problems before.