Damn... I have similar problem with 3.0.3 1155 version
I have also Zen Vision: M
I have been wondering where my 3.5 and 4.5 ratings are gone but now I noticed that every time I sync..MM tags those tracks. Sometimes little a bit (usually) sometimes a lot.
And now I reinstalled my Windows partition (backed up all quite nicely, tracks are different partition than windows) and installed newest MM3...first sync was over 1000 tracks. So my conclusion is that it rounds up those 3.5 star and 4.5 star tracks to 4 and 5 stars. In library I have only couple of dozens those anymore.
Damn Damn....

My music is now better than it should be!
Timestamp is also changed...put in delay... Last time I Noticed big change in my library those timestamps delayed I think almost 12 hours. Now I think that I synced all tracks again back then. Which cause the disapearing of those .5 star tracks.
BTW I could swear that Device to PC sync was available in some time ago...Put now it can't used?!. Though..I have NEVER use it...I just checked if its accidentally on...maybe some bug there related to this problem?
Some history/undo script would be nice to track big changes on library...when you have thousonds tracks you don't always notice the changes although I backup my tracks and database every day.
Damn... I have similar problem with 3.0.3 1155 version
I have also Zen Vision: M
I have been wondering where my 3.5 and 4.5 ratings are gone but now I noticed that every time I sync..MM tags those tracks. Sometimes little a bit (usually) sometimes a lot.
And now I reinstalled my Windows partition (backed up all quite nicely, tracks are different partition than windows) and installed newest MM3...first sync was over 1000 tracks. So my conclusion is that it rounds up those 3.5 star and 4.5 star tracks to 4 and 5 stars. In library I have only couple of dozens those anymore.
Damn Damn.... :( My music is now better than it should be! :o
Timestamp is also changed...put in delay... Last time I Noticed big change in my library those timestamps delayed I think almost 12 hours. Now I think that I synced all tracks again back then. Which cause the disapearing of those .5 star tracks.
BTW I could swear that Device to PC sync was available in some time ago...Put now it can't used?!. Though..I have NEVER use it...I just checked if its accidentally on...maybe some bug there related to this problem?
Some history/undo script would be nice to track big changes on library...when you have thousonds tracks you don't always notice the changes although I backup my tracks and database every day.