xml ext compatibility

I've been looking at the bugs for the xml extension and was wondering if anyone would help test the changes. The patch: http://www.ctindustries.net/libxml/xml_compat.c.diff.txt is an attempt to fix the problem with entities. Its still a work in progress (and yes I know the code can use some cleanup), but if anyone has some complex xml docs they could test this with it would be appreciated. There is a piece commented out for the namespace handler. It seems to work (so feel free to uncomment that block), but there is an issue with the end namespace handler. I dont see how implementing that handler under libxml would be possible (without a really nasty hack). That being the case, should the start handler be implemented in PHP 5 using libxml? And if so, how should the end namespace handler be dealt with? It could be called directly after the start namespace handler (which would break BC) or possible when someone tries to set the end namespace handler, E_WARNING or E_NOTICE could be issued indicating that the handler is inavlid using libxml and the handler just not set. Other than those, the DOCTYPE and xml declaration are going to be a little difficult to get to work correctly, if possible. The output could be close, but whitespaces may be ignored here. Rob