I've run into a bug...
Yummy v1.5.2
I set a filter to ignore FrontPage extension stuff on the server: Name begins with "_" (Just a plain underscore, to cover _vti*, _private, ...)
When I sync, it says that _vti_cnf is newer on my Mac.
I also set a filter to ignore a whole directory tree, "Merchant2"
When I tried to sync, it showed up in the preview plan as "Not on server", but of course it was, just filtered out.
Ken