Okay, instead of everyone leaping to negative conspiracy theory conclusions, why not try, oh, I don't know, giving them the benefit of the doubt maybe?
Firmware updates are for bug fixes.
So is there any "bug" we know of, in relation to color on the GH1?
Why, yes there is! Surprise, surprise. So maybe, just maybe, this firmware update fixes the blue-shift color bug.
Someone who has an unpatched camera should give it a try.
Didn't they release this update today for 9 cameras, including some compacts? I doubt that they all have got a colour bug...