anygui and tk = Label, no Button, for me...

[Michael White]

I tried using anygui-0.1a2 with tk and linux, with the following
(and many variants thereof) more or less from the tutorial.
The Window appears, with the Label, but no CheckBox.

#!/usr/local/bin/python
from anygui import *
app = Application()
lab1 = Label(text='1st')
chk = CheckBox(text='Check', on=1)
w = Window(title='Big window...', size=(700,300))
w.place([chk,lab1],position=(10,10),right=100)
w.show()
app.run()

What's wrong? So far I've not seen this mentioned as a problem...
TextBox and Button similarly fail to appear when invoked.

Thanks,
Mike