I believe I had the following issue prior to 2.2 but was just able to pin it down today. I figured that I was just working too fast and making mistakes.
When importing a 'small' object, the auto scale option kicks in and converts the object to inches with a scale of 25.4. This in itself is not a problem since the object is now quite large and obviously needs to be scaled accordingly.
The issue is that after double clicking the object and entering a value for the scale required, the dialog box itself seems to handle the new scaling properly. However after hitting save and closing the dialog box, I find that the object scale is reset to 5.08! Odd number but always the same 5.08.
Going back to re-scale a second time, the dialog box works properly and I'm able to get the scale required without having to reload the object.