Thank you for the review! I would like to add that this release was not intended to be a major functionality release (hence the "updated") it is intended to resolve the WM 5.0 issues and fix the SD card installation issues that seemed to be a big issue for many of our customers. So your synopisis of who should install is right on the money.
Thank you so much for your feedback!
Sincerely,
Christine - Microsoft Reader Team