I'm using Fedora 17 with gnome-shell. I've installed Ubuntu fonts, and I'm running vim inside the gnome-terminal.
Quote often, I get the following problem:
What could be the problem? The problem happens during cursor movements (either by arrows or by the usual hjkl).
If I go to the other parts of the file, and get back to this section, these chars are gone. This also happens with other fonts (Monaco comes to mind). Also, this doesn't happen in GVIM with the same settings (font selection + size, color theme)