In DrRacket 5.1 on Windows 7, hitting Alt-Space reproducibly produces this output:
system-menu in frame%: unimplemented; args were '() === context === C:\Program Files (x86)\Racket\5.1\collects\racket\private\more-scheme.rkt:265:2: call-with-exception-handler C:\Program Files (x86)\Racket\5.1\collects\mred\private\mrtop.rkt:179:27: on-subwindow-char method in frame% C:\Program Files (x86)\Racket\5.1\collects\racket\private\more-scheme.rkt:149:2: call-with-break-parameterization C:\Program Files (x86)\Racket\5.1\collects\racket\private\more-scheme.rkt:265:2: call-with-exception-handler C:\Program Files (x86)\Racket\5.1\collects\mred\private\wx\win32\window.rkt:705:2: call-pre-on-char method in window% C:\Program Files (x86)\Racket\5.1\collects\mred\private\wx\win32\window.rkt:705:2: call-pre-on-char method in window% C:\Program Files (x86)\Racket\5.1\collects\mred\private\wx\win32\window.rkt:705:2: call-pre-on-char method in window% C:\Program Files (x86)\Racket\5.1\collects\mred\private\wx\win32\window.rkt:705:2: call-pre-on-char method in window% C:\Program Files (x86)\Racket\5.1\collects\mred\private\wx\win32\window.rkt:705:2: call-pre-on-char method in window% C:\Program Files (x86)\Racket\5.1\collects\mred\private\wx\win32\window.rkt:705:2: call-pre-on-char method in window% C:\Program Files (x86)\Racket\5.1\collects\mred\private\wx\win32\window.rkt:705:2: call-pre-on-char method in window% C:\Program Files (x86)\Racket\5.1\collects\mred\private\wx\win32\window.rkt:705:2: call-pre-on-char method in window% C:\Program Files (x86)\Racket\5.1\collects\mred\private\wx\win32\window.rkt:705:2: call-pre-on-char method in window% C:\Program Files (x86)\Racket\5.1\collects\mred\private\wx\win32\window.rkt:705:2: call-pre-on-char method in window% C:\Program Files (x86)\Racket\5.1\collects\mred\private\wx\win32\window.rkt:705:2: call-pre-on-char method in window% C:\Program Files (x86)\Racket\5.1\collects\mred\private\wx\win32\window.rkt:705:2: call-pre-on-char method in window% ... _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev