I recently updated the ROM in my X51v and took the opportunity to update to Active Sync 4.2 from the the beta release.
However, on both machines I sync with the software renamed my X51v to what i assume is a default device on first synchronisation.
I had to set the name of my device back to my preferred name and re-sync on both occasions.
Has anyone else see this behaviour? If not why! Did I do something wrong?