Hi,

In a 3.7-5420 image, I executed "FileList initialize" after installing
the Monticello and MCReader packages.  Whenever I try to bring up a
menu in a FileList, I get a walkback in FileList class>>itemsForFile:
because MCReader (one of the classes registered by "FileList
initialize") does not implement #extension).

I'm not sure what the fix should be.  I manually removed MCReader from
the list of registered classes, which seems to work, but obviously
isn't acceptable.

Joshua