That is a long time bug in gtk that  might be fixed in a future gtk binary 
built.
You can restore the old window behaviour of using off-screen rendering by 
changing

OsMesa=: 0[IFWIN>IFWINE
to
OsMesa=: IFWIN>IFWINE

in the file jzopengl.ijs

Втр, 04 Сен 2012, William Szuch писал(а):
> Using J64-701 with Windows 7
> 
> Following the recent upgrade running these two projects I get a flickering
> of the graphics to a black graphic as the curser passes over the graphic and
> a loss of the top menu.
> 
>  
> 
>  
> 
> Regards
> 
>  
> 
> Bill Szuch
> 
>  
> 
> ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm

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