Note to self - Always, always, always compile apache with --disable-rule=expat
if you want to use Apache::SOAP
without segmentation faults.
You can also set $SOAP::Lite::DO_NOT_USE_XML_PARSER to a true value. SOAP::Lite will then use XML::Parser::Lite. Recompiling apache is a better option if you're able to do that.
I had this problem running SOAP::Lite under Apache::Registry.