I installed Wine as well as the "MS corefonts" add-on.
The fonts inside my Windows apps are okay, but the fonts in Ubuntu are wrong -- both the monospace font used in forms like the one this post is written in, and also the regular fonts used throughout Firefox and elsewhere in Ubuntu - they look smudgy and ugly, like a 1990-era version of ClearType. Gmail in particular is horrible, especially the font in the compose window.
How can I get the regular fonts back?
I'm running Ubuntu 13.10 with stock Unity, no custom skin or anything. I've looked in the "system settings" but I don't see any obvious place that controls fonts. "Universal access" is turned off, and my display settings are okay (correct resolution etc.).
In Firefox preferences, in the "content" section, the selected "default font" is "serif" 16 point.