Dropbox is a great tool but if you use it on more than one computer, you are bound to find 'conflicted copies' eventually. A 'conflicted copy' is created when the same file is edited on two different computers at the same time, or close enough that Dropbox cannot tell which one is the newest.
The good news is that Dropbox creates these 'conflicted copies' instead of trying to guess which file is the one that you want. The bad news is that if you don't notice that Dropbox has created a conflicted copy, you might start using the wrong file. Unfortunately Dropbox does not alert you when a conflicted copy is created, you have to search for it yourself.
Here is an example of a conflicted file: Settings (TJ Luoma's conflicted copy 2013-01-09
