just my observation
it seems that those having battery issues after the may update are all euro roms.
i havent experienced battery issues after updating to 7392. im not even sure what the update is all about.
have you guys tried flashing a different rom region? ( i dont know if that is possible but how i see it if all of our hd7s be it its a euro,us asia version if they all have the same architecture most likely it would work)it could be with the add ons to the euro roms that make the battery life shorter (im not a techie guy but i do know how to flash roms lol!).
for my T-Mo_US hd7, im not experiencing any battery issues after updating to 7392 for three days now.
owns : HTC HD7, HTC Titan ll
owned: HTC HD2, Magic, Elfin and an HP iPaq...