[plt-scheme] Macro Stepper problem

Ho
The Macro Stepper of DrScheme, version 369.8-svn2mar2007 [3m] produces the following error:

procedure insert-syntax/redex method in macro-stepper-widget%: expects 5 arguments, given 4: #2(struct:object:macro-stepper-widget% ...) #<syntax:1:0> (#<syntax:1:0>) (#<syntax:1:1>)

 === context ===
c:\program files\plt-full-369.8\collects\macro-debugger\view\gui.ss:513:10: update:show-prestep method in macro-stepper-widget%
c:\program files\plt-full-369.8\collects\macro-debugger\view\gui.ss:564:10: update method in macro-stepper-widget%

etc.

Looking into gui.ss it seems to me that procedure insert-syntax/redex is called from a number of lines with inconsistent numbers of arguments.

Best wishes, Jos Koot

(((((lambda(x)((((((((x x)x)x)x)x)x)x)x))
    (lambda(x)(lambda(y)(x(x y)))))
   (lambda(x)(x)x))
  (lambda()(printf "Greetings, Jos~n"))))
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