Dear JF,
I found an interesting sync failure.
Look, if I start sms sync and all sms synced, then disconnect the P1i from MPE, then receive 10 new sms (just receive them on the display notification and without pressing YES or NO), at this time if I connect to MPE and sync the sms, non of those new 10 sms will sync.
Is it natural?
MPE just displays the data which the phone gives MPE. The non-Symbians phones does also list unread messages, Symbians does not list them. There is no way to fix this cause it depends on the phones software.