WATree is broken

[GoogleCodeExporter]

1. go to /seaside/tests/alltests
2. go to WATreeFunctionalTest
3. click '+' nothing happends
4. click 'Collection' an exception happends

The problem seems to be that although the message send contains the right
arguments the actual message that is sent does not.

I tried this with both Pharo and Squeak 3.10.2, same behavior.

What makes me nervous about this is that we use a lot MessageSends in other
places as well.

Original issue reported on code.google.com by philippe...@gmail.com on 4 Oct 2008 at 1:30