I haven't done this for a while but I'm sure you used to be able to select a whole bunch of images and star rate them all in one go, ie select 50 images and press the number 2 key and they all get a 2 star rating.
Now however I just tried doing that with a selection of images and only the first one would get the star rating and then move them all to the Trash! And now if I select them all in the Trash and click on 'put back' it will only put back the first one, so it looks like I will have to manually put back over 600 images.
I've tried the prefs and rebuilt the database but its still the same. Help.Me.Please. before I leap from the top floor.