[dnanian]

There seems to be an occasional bug in either Darwin or Cocoa that causes *some* open files, every once in a while, to not have an "end". That is, when we use the Cocoa calls to copy the file (written by Apple), the OS tells Cocoa that the file is gigantic, and so Cocoa copies the file with this (incorrect, very long) length.

It doesn't happen very often, but it does happen on occasion. We're trying to figure out a way to detect this OS/Cocoa Frameworks bug and work around it, but haven't found a good way yet...