Well... I made theme tester block to stick out intentionally, but this clearly was not a good idea, since most people complained. So it is back within bounds.
And could you please clarify, you said left block headers look funny on X-box?
You see, each of them had 5px black line on the left. What for? I don't know. I thought it looked better. But the audience demands clean themes. OK, I'll clean up the "warm" theme and leave all these excesses out. Of course, to get back those shifts and black bars means only uncommenting two lines in "style.css" ;-)