I recently launched a game that decided to set my resolution to 800x600, go fullscreen, and then freeze. After force-killing the game, to my joy, I was met with a panning 800x600 desktop, and had to re-learn how to use xrandr so I could set my desktop back to a reasonable resolution.
But it seems that the ghost of that game still lingers on my system, as I just noticed that two of my frequently-used programs are suddenly impossible to comprehend. It's hard to describe with words, so how about some screenshots:
dmenu and gimp are rendering their UI so small that it's incomprehensible. What's perplexing is that the window manager (DWM, normal font) is rendering that same font just fine. And other programs (like st and xfe) also are working fine.
I have no idea what to do. Fonts are not my strong suit, and I'm afraid that if I reboot, the issue won't resolve itself and my window manager will join the tiny fonts club. I don't know what GTK+ uses for UI fonts, but dmenu uses Xft (X11). How can I make my UI readable again?