I don’t know the answer, but I am having the same problem since upgrading. I look forward to hearing the solution.
Thanks for the great CSS link Yosemite. I fixed the problem by creating a new div wrapper for my content section and setting its width to 100%. IE is infuriating!
Thank you! Next stop, CSS validation.
Sorry. I don’t know what I was thinking. The address is:
http://www.oscarfrenzy.com
The sign-up page is: http://www.oscarfrenzy.com/wp-register.php