If I remove, for example, csv.py and csv.so, I get this in the call trace when the compiled .pyc tries to load it csv.so: File "<stdin>", line 1, in ? File "/usr/src/build/410155-x86_64/install/usr/lib64/python2.3/csv.py", line 7, in ? It shouldn't be a buildroot path there.
Fixed in python 2.3.4-12 or newer.
Closing, since it should be fixed in all supported versions of Fedora Core.