graphic "ghost"

I'm creating a object shape with 'fill' and then updating it's position on the screen with 'set'.

When I also use 'image' to insert bit mapped graphics, I think a bug appears.

pseudo code:

a=fill([x1,y1],...);
set(a,[x2,y2],...);
set(a,[x3,y3],...);
set(a,[x4,y4],...);
set(a,[x5,y5],...);
b=image(rand(20)*100,'AlphaData',0.5*ones(20))
set(a,[x6,y6],...);
set(a,[x7,y7],...);
set(a,[x8,y8],...);
set(a,[x9,y9],...);
delete(b);

% at this moment, and only briefly for about 0.1s(even with a pause after), the initial 'fill' graphic will appear at [x5,y5], the position where the 'image' was inserted on the axis. THIS ONLY HAPPENS if the 'image' have the 'AlphaData' channel set...

Is this a confirmed bug or am I doing something wrong?

Regards, Nuno

[Nuno]

This was further clarified at:

http://www.mathworks.com/matlabcentral/answers/6771-fill-and-image-incompatible

Answer 1

[Nuno]

This was further clarified at: http://www.mathworks.com/matlabcentral/answers/6771-fill-and-image-incompatible

Answer 2

[Nuno]

This is probably a side-effect of bug http://www.mathworks.com/support/bugreports/384622.