'open in other app' button complains about missing file when file hasn't been downloaded yet

2013-04-02 15:30:05.989 U1Files[74505:19103] Unable to copy file://localhost/Users/mmccrack/Library/Application%20Support/iPhone%20Simulator/6.1/Applications/CFE601EB-7572-427F-9A1E-F191D15A032E/Library/Caches/content/~/Pictures%20-%20Michael%20McCracken%E2%80%99s%20iPhone/IMG_2423.JPG to file://localhost/Users/mmccrack/Library/Application%20Support/iPhone%20Simulator/6.1/Applications/CFE601EB-7572-427F-9A1E-F191D15A032E/tmp/7FB7B25A-0A28-400F-B17C-BDB1FA00931C/IMG_2423.jpeg. Error: The operation couldn’t be completed. (Cocoa error 260.)

in the file details view (but not the preview view), clicking on the 'open in other app' button does nothing and writes that error message from within cocoa.

error 260 means the file couldn't be found.