Anyone have experience with Rx and IE9?

I have one user on Windows 7 using IE9 who reported that Rx (6.5.2) did not function.

I tried IE8 in Windows 7 and was able to log in and create a CMS link but didn’t try anything else. I read in this forum that IE8 caused some problems, so I’m not sure if my quick test didn’t uncover them or if 6.5.2 is okay with IE8.