Proper clipping in split panes (2.6.0 Mac Carbon CW)

[slur]

I'm trying to alleviate clipping problems in the Mac version of our application, which works okay in Windows. The problem is that items in sub-panes aren't properly clipped. To illustrate the problem I started with the "splitter" sample code and placed a 7-page wxNotebook in the right pane. With the notebook this wide the tabs are drawn outside the view area. And actually, the tabbed pane control is also drawing over the splitter control whenever the window is resized.

What can I do to ensure proper clipping?

And what can I do to ensure that the wxNotebook's tabs are available when the tabbed pane ends up being wider than the provided area?

(I'm using wxWidgets 2.6.0 because I've had problems compiling our application using 2.6.1. But that's the subject of another post to come....)