This has been broken since the last two updates. I tried the mondo patch and yesterday just got a new update to 51.12
I am unable to set row highlighting to shaded, it keeps switching back to the hideous looking outlined.
That problem was supposed to have been fixed in one of the R 50.xx or 51.xx updates. Check Edit / Preferences / Setup to make sure that "Use New Subscriber settings …" was not activated by mistake.