[Zope] - undefined symbol

Any ideas on where I should start looking for this problem? Upon trying to look at /manage page: ImportError: ./Acquisition.so: undefined symbol: _Py_NoneStruct This happens when I try to run Zope with Httpdapy on Linux. It worked fine on my Solaris machine... Both are Python 1.5.1 and Apache 1.3.3 compiled with pretty much same options. Is Acquisition.so linked with python libraries, and where does it look for Python libs during compile? Thanks, Grisha