> > 1. So is it correct to say that the check/fix boxes apply to ALL sets, not
> just
> > those marked as having problems?
>
> No.
>
> Fastscan does nothing special. It simply does (and in fact it's the same
> routine) a scan but it skips sets which aren't listed in a previous scan. It
> will reset the options which were selected in that last 'full' scan. Exception:
> You are able to enable/disable the fix options.
> So fastscn IS limited to the sets which had issues in the last (depending on the
> selected merge mode this may include clones/parents as well).
>
> Set + unneeded/name check is somehow special since it doesn't work on the single
> archives themselves but on all files in romfolders. If the options were enabled
> in the full scan, they get reenabled and the check is redone.
>
> That's why a changed setname is detected. If you remove a file from a set which
> wasn't listed before, the fastscan won't bring it up.
>
> Fastscans can be done until the loaded data has changed (e.g. when MAME was
> updated).
>
>
> Roman Scherzer
>

Thank you Roman! I've got it now.