Originally Posted By: artie505
Your results will lock directly into tacit's hypothesis.

It may not be that simple. If for some reason those low-res saves lack the same implanted metadata, the two types may react differently to manual renaming. [also, it would be a whole lot simpler if questions were answered and information was not withheld... but, the game is afoot. Proceed at will.]


Originally Posted By: artie505
(Make a command-D copy of the file before you play with it, so you don't risk losing your preview.)

That in itself is akin to renaming (as the word 'copy' gets appended). Perhaps option-drag to another location would be more consistent with the spirit of your experiment? [so that the file isn't renamed.]