Just another bug where it shows that there was ZERO QA done before slapping "Final Release" on SF4.0
While I do agree that we released the 4.0 with known issues, I think that you can agree that this is not a typical case. Like, can you have two files with the same file name in one directory? How do you resolve path under which there could be more than one file?
I agree that we could have handle the case in a better way - for example prompt the user, provide name indexes or use another field for the Url. We are going to use the third approach, so you will be able to have more files with the same name in the same directory (library) - since this is what the people want, we will provide this ability.