om, I was trying to explore a morph yesterday and when I tried to 
scroll up and down with the keyborad, hit a MNF.   The fix was trivial 
though, go two functions up (well down) the call stack and instead of ^
self actionFor: aKey on: view, do: "^view actionFor: aKey" (or 
something like that, I don't recall for certain... -- it looks like the 
victim of an incompleted refactoring...) 

What I was up to at the time was my usual mischief. I was trying to 
figure out CommandShell and trying to figure out how I could redirect 
it to /dev/vc/8. ;)))) 

But it looks like it's due for a MAJOR refactoring. =\