DevIL is used via Ogre, and they report that many people have trouble with newer vesions, so I guess that would explain the seg fault (well, maybe).
For CEGui, are you using CVS head or the beta1-devel branch?
For beta1-devel I have changed all the widget names. These are now of the form:
"TaharezLook/<widget-type>"
where <widget-type> is obviously the widget typr (like FrameWIndow, Button, etc...), so if you are using that code, you need to update the scheme.xml to use the new names (windows look is the same except that its "WindowsLook/<widget-name>"). There's no example files up with these new names at the moment as I thought I was the only one using that code base
Also, the imageset has changed name, but that is now in beta1-devel CVS, so you should have this already.
What I'll do is prepare sample scheme files that use the new names and upload them somewhere, over the next week or two these will make it into CVS anyway.
Sorry for all the confusion
CE.