I noticed that IE9 displays my twentyeleven theme incorrectly. The main navi and side widget are displaying without the proper formatting and the layout is wrong and messy.
I tried removing the Helvetica fonts from the style sheet, and adding links in the header.php to refer to the stylesheet as suggested in some other posts I found online. But it didn't work. What's interesting, is after I uploaded an edited style.css and header.php using FTP, I refreshed my page in IE9 and the home page came up correctly. But if I then clicked on a menu item or refreshed again, the screwy lay out showed again. No issues in Chrome or Firefox.
Also, I don't mean to edit the main theme, I don't have the need to create a child theme. I only edited the style.css and header.php to check if this would solve my issue. If it did, I was going to create a child theme. I know this is best practices.
Here's the link http://doederij.be
I know that these themes are supposed to work in IE9 so I wonder what I'm missing. Any pointers would be much much appreciated!