When SyncML is enabled, deleting a task or a note does not actually
delete it, but rather mark it as deleted. The deleted task or note is actually
removed from the task or note list on the next synchronization. For this reason,
if you happen to use the SyncML feature, then disable it without having done a
sync, there may be some deleted notes or tasks in your task file. This is not a
problem, but takes a little more disk space.