Ok - this bug has nothing to do with weave itself. I think any extension
written in C or C++ that has a space in the filename will raise the
error in both windows and gnu/linux.
Here is a simple c extension with and without spaces. The one with
spaces in the filename fails to build on standard python. Whereas the
one without should build fine. Did for me on windows 2000 on both python
2.5 and 2.6 with and without spaces in their paths.