Hi there,
I really really like Notae – the interface, the tags, the keyboard shortcuts, etc… all splendid stuff.
One bug that I have found though, is that if text notes are not saved, and the text window lose focus, then the text entered prior to the window losing focus is lost when you click back on the note. Also the text cannot be resurrected by ‘undo’ing it.

with all best wishes, Tim.