[Koha-devel] XML processing

Hi, all. Can anyone point me to documentation about why Expat is considered incompatible with Koha (and I'm assuming MARC::File::XML). I know there are dire warnings against such, but what are the test cases where it fails? Expat is considerably faster than the LibXML implementation, and it would be a shame if we were continuing to avoid using it without due cause. I've been unable to detect issues with it in my anecdotal test cases thus far. Thank you, Clay