adding canvas to panel after panel is mapped does not work

[pgt, 12/14/1995]

I have a program that displays a canvas inside a panel (inside a frame).
While the program is running, another canvas may be added to the panel
(the program makes sure to change the panel layout before adding another
graph to the panel). This has stopped working with the 1.0beta2 release.
It does work with 1.0betaL.

You can find the code in ~pgt/java/dvl/stock.awtbug
Run the code with:
java stock IBM
Then click on the Properties menu, and from that menu select the "Show stock names"
item. Then click on the SUNW checkbox. This should add another graph to the main
window; it works for the 1.0betaL but not with 1.0beta2.