Are you sure the files actually were open at that time? Because at least some (text) editors work so that they don't work on the actual file, but rather work on it's copy, and when you save, the changes are then written to the file. That way the original file does not need to be open all the time, potentially causing some trouble (and that's why the editors, or some of them at least, can warn you if the original file was edited by some other process). I could be wrong, but check it to make sure.
The copy would of course still exist on the same directory (or so I think), but it's also possible that the contents are kept in a buffer and the file - be it the original file or copy - is only open when it's being read or written. Namely just when you open or save, or if the app automatically saves changes at intervals to keep it "safe" - and these "autosaves" it probably puts into the cache file rather than the original. Usually these "cache files" have the same filename as the original, but a tilde ~ added to it.
Last edited by b0uncer; 05-16-2008 at 10:21 AM.