Fixed in 1.5.6

Fixed in 1.5.6

Fixed in 1.5.6

Fixed in 1.5.6

Fixed in 1.5.6

Thanks for noticing this. Yes, this is because of different date format settings on different PCs. The cached values are used for time-based search.The problem will be only that the time search won't find all the notes.
But since time based search is textual and will go away anyway (text-based matching will be replaced with date-based matching), and these columns will be removed from the NoteCache table, I think there's no real need for fixing it right away.