Yesterday I updated my system and it seems it broke some Gnome Applications.
gnome-builder doesn't launch and I get the following error:
gnome-builder: symbol lookup error: /usr/lib/libdevhelp-3.so.5: undefined symbol: webkit_settings_font_size_to_pixels
I get a similar error with devhelp and other applications which use webkit rendering engine (such as epiphany). In this error, there is always a reference to webkit_settings_font_size_to_pixels.
Tell me if you want more informations.