[Zuerst]

I was under the impression the the part pointed to by the arrow is inside/flush with the gray part like the plug show by the stock picture below?
 
http://img.photobucket.com/albums/v157/Zuerst/wtfwtf.jpg
 
http://reviews.cnet.com/sc/32908701-2-200-0.gif

 

[ClieOS]

Mine is flush inside, but it is possibility that Sony are making the plug iPhone compatible in later batch.

 

[Duncan]

Mine is like that on the photobucket link...
 
Mine are from when they very first came to market if that helps..