[etoys-notify] [JIRA] Created: (SQ-921) Ghost Images left in Playfield

[Stephen Thomas (JIRA)]

Ghost Images left in Playfield
------------------------------

                 Key: SQ-921
                 URL: http://tracker.squeakland.org/browse/SQ-921
             Project: squeakland
          Issue Type: Bug
          Components: etoys
            Reporter: Stephen Thomas
         Attachments: Multiplication Model X.002.pr

See attached project Page 3 

I have only seen the Ghost Images when moving the vertical slider (moving slowly seems to be more likely to re-create the problem).

Note: the length/width of the rectangle can go negative, I preventing that by changing the script to add x := 0 max: x.  But when I did everything stopped working, will investigate and file bug once sure error is not in programmer. 

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