I thought the backlight problem would be more of an issue, but once I settled into reading, it never even occurred to me. If I'd had a headache or something, that might have been a different matter.

I've found that a non-white background is easier on the eyes for me, so I try to get my text editing windows as close to Cosmic Latte as I can. Now that you've reminded me, I might try setting up my PDFs with that as a background color.