Not sure if this is related to the upgrade, or the style, but I have been using the CGA Dark & Red Fluid style, and sometimes the words are whited out. For instance, when I am replying right here, if I click on the 'Insert' button to insert a quote or code, the words there are whited out, and I cant read them.
This is just cosmetic, and it doesnt happen on the Dark & Red non-Fluid, but I like the way the page is stretched with the Fluid one.
Edit: I should also add that it happens on the Light & Red Fluid as well, so it must just be the Fluid style..