OK, just did a little testing:
IE does all text fields light-blue-on-black.
iCab completely ignores these instructions, and uses the default black-on-white.
Chimera partially ignores these instructions, and makes the textarea fields light-blue-on-white, which is impossible to read.
Either of the first two behaviours is fine, it's just the last one that's dreadful. However, I don't like being forced by some website to change browsers just to get text fields to be usable.
Ah, I see - flash has been removed.