Problem with the latest release

Hi,
I just downloaded the latest release of wxGlade (1.0.0a7) on my Mac
(OSX 10.8).

I unpacked it and ran as:

python wxglade.py

wxGlade did start.

Then I clicked on the wxDialog/wxPanel. The dialog shows up.

I selected wxPanel. All the button radio boxes becomes disabled and I press OK.

I got an error saying:

[quote]
An internal error occurred

Error Type: <type 'exception.KeyError'>
Error summary: No summary available

This is a bug - please report it.
[/quote]

Turning off "Add sizer" works OK.

Thank you.