Did you try right click and "Copy Download URL"?
Thanks for pointing it out. I right-clicked it a dozen of times, and I sure didn't see it then! Now that you told me, I see it every time
I even discovered that download's Properties dialog has source URL tooltip if one hovers over the From label, and if ones right-clicks on the label (no indicator that it's clickable though), popup with Go To Download Page and Copy Download Link shows up.
So, all my functional issues are moot. Now only usability, i.e. ability to discover, remain. It would help that any text that has right-click menu can act like a menu item and can inverse its colors when one mouses over it. BTW, I'm on WinXP.