[matplotlib-devel] problems with labeling contour lines in 0.98.3

Hello David and the developers list-

I have had little luck on the mailing list, so sorry for writing you
directly (David may be on vacation).

I have two problems labeling contour lines in 0.98.3.

First, when I call clabel, it removes all contours that are not labeled
(because the label doesn't fit on the section of contour, I presume).
This seems like a bug to me (or a really odd feature). It doesn't do this
when inline = False, but I don't think it should do it either when inline =
True
Easy example:

>>> x,y = meshgrid( linspace(-10,10,50), linspace(-10,10,50) )
>>> z = log(x**2 + y**2)
>>> cobj = contour(x,y,z) # Note that there are 8 contours levels (11
contour sections in all)
>>> cobj.clabel()
<a list of 8 text.Text objects>
>>> draw()  # Now only 5 contours are drawn; the ones in the middle are
removed.

Second, when using the new manual labeling of contour labels (which is
pretty neat!), how do I end this feature?
The doc string says: right click, or potentially click both mouse buttons
together (which already worries me).
Neither works for me on win32, mpl 0.98.3, TkAgg backend, interactive mode.
Does anybody have a solution?

Thanks, Mark