and with G3 down it's kinda hard to check it out.There should be a bit of info over at G3, as there some post preview in google state.ids duplicate entry, but that's from 2007.
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they probably don't check for it since if they did and the STATE_NOT_VISIBLE version were present it would crap out the compiling of their scripts since their label STATE_NOT_TARGETABLE wouldn't be present.RR, atweaks and SCS/SCS II add the same value - 0x00400010 - as STATE_NOT_TARGETABLE without checking if 0x00400010 is already present in STATE.IDS.
I could be mistaken but I think that if both labels were present, it would compile fine since the label is looked for in the IDS and then replaced with the numerical value. However on decompile the last label in the file gets used since the entire file is put into memory...