This is still an issue with IE9. WA support was unable to duplicate it, so couldnt find any answers. However, I still have this issue, as do most of my clients who use IE9.
I dont know if it is a setting somewhere in IE, or a combination of settings. I have tried everything myself, and have occasionally gotten it to work correctly, but it doesnt seem to stick. Whatever the setting, or combination of settings, it seems common, because virtually all if my clients who use IE9 have this problem.