I finally updated my WordPress theme to the latest version (I haven't done any updates in almost 2 years). LeicaRumors and PhotoRumors have already been running the new design for two weeks and I did not have any issues so far.
By default, the background is white... I know this will cause a riot. Let's just run like that for few weeks and see how it will go - I think the white background will be initially distracting, but with the time it will grow on you and you will like it better - at least I did. The last poll was split almost 50/50 between the black and white color choices.