I agree...this is poor design and not really a bug....it's like we (the customers) are proofing Apple's work. When it should be the other way around, they should be proofing their own work, did anyone test this and say oh it's green and it's hiding the battery charging color. *smacks head*
Remember that some people may turn off the battery meter # as it's an option, if you do that then you are really in trouble with this color blending.