I just logged in and found that there is a font change in SE sites ( StackOverflow & MetaStackOverflow ). I am using Google Chrome Version 32.0.1700.107. I marked the same font change in Firefox browser as well. Is this new look or Is it temporary ? By the way I like this new look very much.
We uh, haven't made any changes lately. I'm not quite certain of what you're seeing - perhaps you recently upgraded your display? (Retina makes a world of difference in fonts) .. ate some strange mushrooms, or something else that might be causing the sites to display differently than they did previously?
No changes to CSS have been pushed in the recent past, so I'm a little baffled as to what might be causing you to see things differently. I looked at the screen shots you provided, but the things you've pictured have looked the way that they do for quite a while.
I wish I could be more help, but .. nothing accounts for what you're reporting :)
Its mistake from my side. I just remind that yesterday there was a performance issue on my computer. Due to this my administrator did changes in my computer. He just open on mycomputer's property window -> Performance Option, modified existing option. I believe due to this I am seeing these changes in my browsers.
I apologize for this.