Hi there!
I think I found some bugs while testing with
MM 3.2.5.1306/SansyMonkey 0.3.1.5.
Regarding Playcounts:
A) With each sync "MediaMonkey -> Sansa", Playcounts from a certain track within MediaMonkey will be added everytime to the Playcount in the Sansa Rockbox-Database, although checkbox "Reset Play Counter" is checked.
Example:
Track Playcount:
Before Sync: MM:2 Sansa:1
After 1st Sync: MM:2 Sansa:3
After 2nd Sync: MM:2 Sansa:5
The Mouse-over description from this checkbox is "Set the rockbox playcounter to the value stored in MM".
So I assume the behaviour should be:
Track Playcount:
Before Sync: MM:2 Sansa:1
After 1st Sync: MM:2 Sansa:2
After 2nd Sync: MM:2 Sansa:2
I found no difference in behaviour whether this checkbox is checked or not.
B) Sync from "Sansa -> MM":
Playcounts within the Sansa are shown as 0 after sync, even if the checkbox "Reset RB Play Counter to 0 after import" is NOT checked.
("Reset MM Playcounter" is checked)
Example:
Track Playcount:
Before Sync: MM:2 Sansa:10
After 1st Sync: MM:10 Sansa:0
After 2nd Sync: MM:10 Sansa:0
I assume the right PCount (10) is stored on the Sansa, and is just shown false (0) after the sync in SansaMonkey.
So I think this is just a minor bug.
C) This is a feature wish

Would it be possible to add two new colums shown after sync "MM -> Sansa"
"old Playcount" and "new Playcount"
This would be awesome for testing if the playcount sync works as supposed.
@Onkel_Enno: It would be so cool, if you could fix these "bugs" (if they are bugs).
I am more than willing in helping with testing!