Decent start, but major flaw

Id expect to use a tool like this to check if files in two folders are different or missing. And this sortof works, provided the missing item(s) are only in the "left" folder. But its a one-way operation; anything missing in the "right" folder wont show up in either list! Youve got to run the diff twice, with each folder taking turns in the "left" and "right" spots. And since theres no swap-left-and-right button and no drag-drop support, its a bit laborious to do this.

Daaron about Compare Folders