> We'll have to deal with two codebases. You already have to deal with two codebases, IE8 and IE9. One can have bugs that the other doesn't. Right now, you de

> We'll have to deal with two codebases. You already have to deal with two codebases, IE8 and IE9. One can have bugs that the other doesn't. Right now, you deal with: * IE8 + jQuery 1.9 * IE9 + jQuery 1.9 I assume you are testing both? If so, then all you will have to do is instead test: * IE8 + jQuery 2.0 * IE9 + jQuery 2.0