How do I turn off underlined links?
I don't think you can, never tried.

So I'm just curious... does everyone view webpages with underlines all over the page? That's terrible for webpage design. Not criticizing, just wondering if that's how everyone else views the web.

How do I turn off mouseover help, like on vBulletin forums I don't want it to show thread previews.
Thats basically an ad and I hate them too.

No, not the random hyperlinks in text. This is something else. It was previously "Show tooltips"

Does Ctrl-click no longer work for save-as?
No, thats the open link in new tab button

Yes, if you do it on a link. But old functionality was save-as if you did it on an image.

Anyway, thank you both for your responses and suggestions.