So far I'm pretty happy with Win 7, but one new feature is downright painful for me. In the Details view of Windows Explorer, the column headers and all columns except "Name" are displayed in a faint gray-on-white text. My eyes are unusually sensitive to low contrast, and they start to ache after only a few seconds' viewing.
I have the same problem on the web, where the low-contrast look has been stylish for several years, but a Firefox add-in called Stylish lets me change color schemes of sites I visit a lot.
If anyone can tell me how to convince Windows to use a normal black-on-white font for those columns, I'll be very grateful.
I do know about the high-contrast themes, but they're a sledge-hammer solution for a carpet-tack sized problem.