When I got 0575 a while back, my HR24 got logos pretty quick, but even after weeks, my H24 never did. I upgraded the H24 to 058C and then to 058D -- no logos. I've never had logos on my H24 with the HD GUI. Lucky I don't use this TV as much so I've just accepted it.
I don't see the obsession with it, your programming works, your guide works, it tells you what the show is, why is No channel logos a big deal, it's just cosmetic.