Exif "subject distance", shows in Bridge 5, gone in Bridge 6

Question

Just made the switch from CS5 to CS6.  The Camera Data (Exif) panel in Bridge 5 gives me the Subject Distance value.  In Bridge 6 that field is not shown.  Under Preferences>Metadata, the Subject Distance field is check in both versions.  What has happened to this datum in Bridge 6?

Answer 1

Curt Y,
Thanks for your response.  I was aware of the thread you reference.  In fact I have implemented the excellent workaround described by Paul Riggott in that thread. 
Nevertheless that thread fails to provide an answer to the original question:  Why is subject distance correctly displayed in Bridge 5 and that field completely absent in Bridge 6.
In my case this is true for both native NEF files and when the same file is converted to DNG. 
It is true for both old and recent files and for files from D700 and D800 cameras. 
In the case of these two cameras, the Subject Distance is found under the Makers Notes but is not found under the Exif data as reported by ExifToolGUI.  This last finding confirms the observation of DLC (reply #4) in the cited thread. 
However if one examines the advanced tab in file info, one finds the following:
In both Bridge 5 and Bridge 6 there is an entry under Exif Properties labeled "Subject Distance"
So the question remains: why is this datum displayed in the Camera Data (Exif) Panel of Bridge 5 but not in Bridge 6?  And what can be done to correct this glitch?
Addendum / Correction
I have just discovered the following:  Older (raw) files which had been previously opened with Bridge 5, regardless if they were edited or not, when now opened in Bridge 6 do show the Subject Distance in the Exif Panel.