Trust me its the WRE rom or at least based on it, the last version of WRE rom had nearly everything working ok, only MMS receiving didn't work and GPS only worked with google maps, everything else was ok. If it really was CM9 it would definately have the Trebuchet launcher on it....
I know this because I have done a lot of work on the last WRE rom trying to fix those 2 issues....
I don't say you're wrong, you know a lot mo more more about developing than me, but they changed also the boot animation
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