Comment 13 for bug 277363

I can confirm that this also happens on Karmic as batu says. The program doesn't crash, but it does print the following messages:
shared memory images supported
Delete failed (bug #524554)
Traceback (most recent call last):
  File "/usr/lib/skencil/Sketch/UI/tkext.py", line 368, in RebuildMenu
    self.menu.delete(0, END)
  File "/usr/lib/python2.6/lib-tk/Tkinter.py", line 2678, in delete
    self.deletecommand(c)
  File "/usr/lib/python2.6/lib-tk/Tkinter.py", line 361, in deletecommand
    self.tk.deletecommand(name)
TclError: can't delete Tcl command
Delete failed (bug #524554)
Traceback (most recent call last):
  File "/usr/lib/skencil/Sketch/UI/tkext.py", line 368, in RebuildMenu
    self.menu.delete(0, END)
  File "/usr/lib/python2.6/lib-tk/Tkinter.py", line 2678, in delete
    self.deletecommand(c)
  File "/usr/lib/python2.6/lib-tk/Tkinter.py", line 361, in deletecommand
    self.tk.deletecommand(name)
TclError: can't delete Tcl command
/usr/lib/python2.6/lib-tk/Tkinter.py:1149: DeprecationWarning: catching of string exceptions is deprecated
  except TclError: pass