User blog comment:BertH/Technical Update: October 9, 2012/@comment-1142365-20121009203616/@comment-3441771-20121014052546

About Math's comments: Well, I was only mentioning something I've been working with recently. I knew that IE doesn't support all the standard properties. Anyway, most of those things you pointed out are supported in IE9. However, I do know your pain.

As I sort-of said before, why should we bother about IE8 and back. Since reading KP's comment yesterday, I've changed my mind slightly. I think that basic support for IE8 is necessary, but I wouldn't go further back. Seriously, IE8 was built without supporting HTML5, yet HTML5 was on the horizon!

As Dinoguy said, you can use filters for most of the properties Math mentioned.

@Dinoguy's last comment: The IE8 -ms-filter is excellent for quarantining the IE8 stuff from the rest of one's sheet. ;)