said by b_p_smith:In there, experiment with the settings, including setting compatibility mode to XP SP3.
The only thing I get are several Vista entries (with SP1, SP2, and so on). From what I've read, Vista also ignored this type of appearance issue with individual programs. I messed with the Win 7 themes and appearance settings, and can make the entire OS look intensely ugly and sorta get the black LR back, but like I said, it's pretty ugly.

LR is a 64 bit program when it installs to Windows 7, so that may explain why no XP compatibility mode is visible.
Great suggestion, thanks. New to 7, so I didn't know about the compatibility mode - it may come in handy with some of the older programs I'll be installing.