I guess you just switched to source editing mode (which doesn't seem to have custom CSS styles for selections)Right now, anything I highlight is blue. The difference before is that it was light pink, and on the old monitor I couldn't really see it. On the new monitor it was visible.. But what you've done right now looks perfect, at least to me.
danger@ seems to know this, cause he changed the very setting according to my suggestion:... I haven't figured out the relation between those names and the various parts of the site's page.