That's my point -- if you haven't upgraded by now, you might not be able to. Period. Which is not to say I think they should fully support IE9. I'm just saying

That's my point -- if you haven't upgraded by now, you might not be able to. Period. Which is not to say I think they should fully support IE9. I'm just saying that (maybe misguidedly) I expect Trello users to be a little smarter than the average bear.