I am using a child theme for twenty eleven. Today, I updated twenty eleven and now my header image, instead of appearing immediately below my nav menu, appears to the right of the menu and extends off the right side of the screen.
This occurs on my PC laptop, but not on my macbook pro. I've gone through the CSS and it is all correct. I've tried clearing my cache and restarting my browser. The child theme doesn't contain any code referencing the header image or its size.
Unfortunately, I cannot post the address at this time because the site is for members of a health services agency and contains confidential information. I'll see if I can find a solution, but in the meantime I'd appreciate any ideas.