same problem here.
after changing these lines in /boot/config.txt
hdmi_group = 1
hdmi_mode = 1
I got normal fonts and images back in emulationstation. However, with these settings my Pi is running in VGA-mode and presents an ugly low-res version of emulationstation.
Changing hdmi_mode to something else doesn’t help – then the gibberish and missing images are back :-(
I reinstalled emulationstation from sources, but that didn’t help either.
any idea, what could cause this? It appeared after I moved a lot of files over via WinSCP, and afterwards deleted some files through the same method. I also edited one or two files through WinSCP’s editor.
EDIT:
hmmm .. after changing
hdmi_mode = 4
(which equals 720p)
and rebooting 2 or 3 times, fonts and missing images are normal again! very strange, but I am glad its fine again ..