0.5RC2:problem with Sliderthumb with slider control (again)

[franckypoune]

Good evening,
I have a problem with the display of the Sliderthumb in slider control.
I load a simple layout which its contains a FrameWindow with a slider control.
After i have loaded it , i only set the position of the window with the method setPosition.
The window is displayed in the right place but in the window, the slider is present without the thumb.
In fact, i notice that in the method setArea_impl when the size of the window does not change, the event Onsize() is not dispatched.
So, before to call setPosition method , i change the width of the window in order that the event Onsize() is sent.
In that case, the thumb is well drawn.

Someone has already see this?
Thanks in advance.