Two things that I've found:
* there can be stepping morphs that aren't in the world. Andreas has
pointed out that the problem is that they're accessing the Sensor
directly.
But for testing you can try opening a Transcript and saying in a
Workspace:
 Utilities cleanseOtherworldlySteppers
See if there's anything in the Transcript.
And also make sure that there aren't two Morphic processes (I've seen
this more than once); you'll usually see redraw problems with this one.
You can use the ProcessBrowser to examine the list.
Or in a Workspace you can make sure that
Project uiProcess == Processor activeProcess
or you can get a collection of possible Morphic processes:
uis   nil.
[uis   Process allInstances select: [ :p | | c |
 c   p suspendedContext.
 c notNil and: [ c longStack includesSubString: 'WorldState' ]]]
forkAt: 70.
uis size > 1 ifTrue: [ uis inspect ].
--
Ned