This isn’t the end of the world for me, in fact it’s barely an issue at all, but just pointing it out in case DOpus is actually to blame and there’s any room for improvement. The attached screenshot shows a JPEG file being hovered over with the mouse in a DOpus lister, and displaying the Comment metadata field from a different JPEG file that I added the comment to months ago, when in fact no Comment metadata exists in the file under the mouse pointer.
Some of the other metadata displayed in the tooltip is also not quite correct, though I don’t believe any of it’s being taken from another image file:
Actual Aperture is is F/1.99 (when file is opened in Set Metadata dialog), but displayed in tooltip as F/2.0. (Being rounded, I suppose?)
Subject Distance is displayed as 0.285 mm (which can’t possibly be right anyway) in Set Metadata, but in tooltip as 285 mm.
Other than those, everything is correct.