The problem lies in incompatiblities of Resin's xml parser. And it appears that override it pretty easy once you know where is the problem.
So, we download XML implementaion from apache: xercesImpl.jar
Then we put it in our /WEB-INF/lib/ directory
In WEB-INF/resin-web.xml (if it doesn't exist - create it, for syntax refer to the website of resin). Add the following entries:
<system-property javax.xml.parsers.DocumentBuilderFactory="org.apache.xerces.jaxp.DocumentBuilderFactoryImpl"/>
<system-property javax.xml.parsers.SAXParserFactory="org.apache.xerces.jaxp.SAXParserFactoryImpl"/>
After that everything should be O.K.
It is possible of course to configure this on global level in Resin (check the docs again), but this works with default Resin installation.