This is just a minor inconvenience.. easily solved by closing the file and re-opening, but:

Say I have test.php open in the editor. Then I open the Workspace tab and download test.php from FTP. Even though I know the file I downloaded is different, the editor does not reflect the newly downloaded file. If I forget to close and re-open test.php, I may accidentally upload and end up overwriting changes.

It would be cool if the editor could re-load an open file if it gets downloaded from FTP. Even better might be a confirmation box like Dreamweaver provides, which asks if you would like to re-load the file.