Thanks for the reference to that plugin. However, the site works better without it.
The fix I posted above is good, though. If you were to incorporate it into your header.php, it would help others using your theme to be able to present a better-looking site to the large number of visitors who use IE8.
As for discouraging the use of IE8, should I put up a page that says to visitors, “I don’t like your choice of browser, so if this site looks crappy, it’s not my fault?”
20 to 30% of computer users still use Windows XP even given its upcoming end of support life. And on Windows XP, version 8 is the highest version of IE that you can even get. These people’s computers do not support IE 9. And they are a very significant percentage of users.
What do you say to these people? “Sorry, we don’t serve you. Either go buy a new computer, or go to some other web site?” My clients won’t be very impressed with my saying that to a large percentage of their customers.
So I don’t see it as being my job to tell visitors what OS or browser I want them to use. I might as well tell them, “Sorry, we don’t cater to smartphones.”
My job is to cater to whatever they’re using. And for 22% of people who have computers, that’s still Internet Explorer 8.