Tested using the following procedure:
Place Units with init "this setobjecttexture[0/1/2,"a.paa"]
Dismiss error and start Mission
If selections work, Unit will be transparent. The following Units do not have working hidden selections of this fashion:
Edited: 04.11.2013 (no dev)
All Blufor Uniforms (Appears resolved)
Greenfor Combat Uniforms partially ignoring retextures (sleeve flag on rolled sleeve uniform)
Greenfor Officer Suit
Rangemaster (Appears resolved)
IFV-6 Panther
BTR-K
Marid
Ifrit
Strider (Resolved by 0.76)
HEMMT (Resolved by 0.76)
SDV (Resolved by 0.76)
AH-99 (Resolved as of 0.75.108659)
FIA Uniforms (Release version, no hiddenselections)
New Civilian clothes (ie, non rangemaster or tee+shorts clothes) no hiddenselections
I have not yet scoured the configs as I have no time right now, however, I am aware that the following do not have working HS as of this moment:
greenfor Plate carrier