Possible bug in Photoshop CS6 with app.activeDocument.path.

Question

JavaScript running in Photoshop CS6 under OS X 10.7.5 returns the wrong result for app.activeDocument.path when the file is located on the boot drive. The result is undefined and an error message incorrectly states that the document has not been saved yet. If the file is located on a remote volume, the correct path is returned.
To reproduce this problem, create a new file in Photoshop CS6 on a Mac. Save the file to the desktop. With the file still open, run the following script in ExtendScript Toolkit.
// start script
var thePath = app.activeDocument.path;
alert(thePath);
// end script
Running the same script with a file located on a server volume open in Photoshop correctly returns "/path/to/file.psd" instead of undefined and no error occurs.
This appears to be a bug in Photoshop CS6's JavaScript implementation. This problem did not exist in Photoshop CS3.
A similar issue prevents Photoshop CS6 from saving files to the boot drive using activeDocument.saveAs.
Has anyone else experienced this problem? If so, have you discovered an alternate method to determine the file path or save a file on the boot drive?

Answer 1

Don't know if this will help much but at least you can use it to check a document's filepath without throwing an error. And maybe tell if the problem is with the Photoshop DOM.
function hasFilePath(){// returns true/false
    var ref = new ActionReference();
    ref.putEnumerated( charIDToTypeID("Dcmn"), charIDToTypeID("Ordn"), charIDToTypeID("Trgt") );
    return executeActionGet(ref).hasKey(stringIDToTypeID('fileReference'));
function getFilePath(){// returns path as a string if exists, undefined if not
    var ref = new ActionReference();
    ref.putEnumerated( charIDToTypeID("Dcmn"), charIDToTypeID("Ordn"), charIDToTypeID("Trgt") );
    var desc = executeActionGet(ref);
    if(desc.hasKey(stringIDToTypeID('fileReference'))) return decodeURI(desc.getPath(stringIDToTypeID('fileReference')));