Has anyone noticed that there are two distinct styles of dual-plug headphone jacks used on airplanes? I have a Bose-supplied adapter; both pins are of equal length and width.

I tried to use this adapter in First Class on a reconfigured United 767-300 and found that it didn't work! Each of the two pins needed for this jack have unique length and width. Fabulous. Sadly the drinks weren't served in ruby slippers, and the reading lights didn't strobe; some things were actually standardized. Are there single adapters (mentioned in the other thread?) that work for both plug styles?