Greetings. I did a new install of Mint 12 KDE (last 2 years with Mint 10 Gnome, and several KDE distros, before that). I've had a few glitchy problems, but, overall, I'm rather pleased with the setup.
So, I had everything looking good. Had used the system settings to change all fonts to Nimbus Sans L, in place of Ubuntu.
But, I experimented with desktop effects, which had been shut off, probably because my system is 6 or 7 years old, yet quite serviceable. I used the XRender option. Nothing bad happened. Only some effects seemed to work, and I decided there was no point in using desktop effects.
Not long after, I logged out, then back in. All of my fonts were back to Ubuntu... by appearance. They're still listed as Nimbus in the settings. No matter what I set the fonts to, Ubuntu is what is shown. When I make changes, the windows and dialogs appear to update, but, they're still showing a version of the Ubuntu font.
I'm NOT sure that my play with desktop effects caused the problem. Since that was my first logout and back in since changing fonts, it's possible the fonts would not have stuck, anyway, for some reason.
So, I'd appreciate a hand at getting my fonts back in shape.