1. Go to Tools->Export in a freshly installed Magnolia-Author
2. Select userroles
3. Click export
4. Save export file

Expected result: file with size roughly similar to the sum of the files at magnoliaAuthor/WEB-INF/bootstrap/common/userroles (about 82K)
Actual result: File is 6.6MB (It's possible that this may just reflect repository overhead – I don't know enough about Jackrabbit's inner workings to be able to say, but it seem like a LOT of overhead)

5. Go to Tools->Import
6. Select userroles
7. Browse for the previously exported file
8. Click import

Expected result: data is read into the repository, generating new ID for imported nodes
Actual result: data not moved into repository, error in catalina.out:

ERROR info.magnolia.cms.servlets.MVCServletHandlerImpl MVCServletHandlerImpl.java(execute:99) 13.10.2006 11:04:07 can't call command: importxml
org.apache.commons.lang.exception.NestableRuntimeException: javax.jcr.PathNotFoundException: /jcr:root
at info.magnolia.cms.core.ie.DataTransporter.importXmlStream(DataTransporter.java:282)
at info.magnolia.cms.core.ie.DataTransporter.importFile(DataTransporter.java:122)
at info.magnolia.cms.core.ie.DataTransporter.importDocument(DataTransporter.java:99)
at info.magnolia.module.admininterface.pages.ImportPage.importxml(ImportPage.java:132)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at info.magnolia.cms.servlets.MVCServletHandlerImpl.execute(MVCServletHandlerImpl.java:96)
at info.magnolia.cms.servlets.MVCServlet.doPost(MVCServlet.java:111)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at info.magnolia.cms.filters.MagnoliaManagedFilter$CustomFilterChain.doFilter(MagnoliaManagedFilter.java:102)
at info.magnolia.cms.filters.MgnlCmsFilter.doFilter(MgnlCmsFilter.java:109)
at info.magnolia.cms.filters.MagnoliaManagedFilter$CustomFilterChain.doFilter(MagnoliaManagedFilter.java:106)
at info.magnolia.cms.cache.CacheFilter.doFilter(CacheFilter.java:93)
at info.magnolia.cms.filters.MagnoliaManagedFilter$CustomFilterChain.doFilter(MagnoliaManagedFilter.java:106)
at info.magnolia.cms.filters.MgnlInterceptFilter.doFilter(MgnlInterceptFilter.java:128)
at info.magnolia.cms.filters.MagnoliaManagedFilter$CustomFilterChain.doFilter(MagnoliaManagedFilter.java:106)
at info.magnolia.cms.filters.MgnlContextFilter.doFilter(MgnlContextFilter.java:45)
at info.magnolia.cms.filters.MagnoliaManagedFilter$CustomFilterChain.doFilter(MagnoliaManagedFilter.java:106)
at info.magnolia.cms.security.SecurityFilter.doFilter(SecurityFilter.java:96)
at info.magnolia.cms.filters.MagnoliaManagedFilter$CustomFilterChain.doFilter(MagnoliaManagedFilter.java:106)
at info.magnolia.cms.filters.MultipartRequestFilter.doFilter(MultipartRequestFilter.java:80)
at info.magnolia.cms.filters.MagnoliaManagedFilter$CustomFilterChain.doFilter(MagnoliaManagedFilter.java:106)
at info.magnolia.cms.filters.MgnlVirtualUriFilter.doFilter(MgnlVirtualUriFilter.java:83)
at info.magnolia.cms.filters.MagnoliaManagedFilter$CustomFilterChain.doFilter(MagnoliaManagedFilter.java:106)
at info.magnolia.cms.filters.ContentTypeFilter.doFilter(ContentTypeFilter.java:66)
at info.magnolia.cms.filters.MagnoliaManagedFilter$CustomFilterChain.doFilter(MagnoliaManagedFilter.java:106)
at info.magnolia.cms.filters.MagnoliaManagedFilter.doFilter(MagnoliaManagedFilter.java:71)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:186)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
at java.lang.Thread.run(Thread.java:613)
Caused by: javax.jcr.PathNotFoundException: /jcr:root
at org.apache.jackrabbit.core.HierarchyManagerImpl.resolvePath(HierarchyManagerImpl.java:263)
at org.apache.jackrabbit.core.CachingHierarchyManager.resolvePath(CachingHierarchyManager.java:127)
at org.apache.jackrabbit.core.HierarchyManagerImpl.resolvePath(HierarchyManagerImpl.java:202)
at org.apache.jackrabbit.core.CachingHierarchyManager.resolvePath(CachingHierarchyManager.java:196)
at org.apache.jackrabbit.core.ItemManager.getItem(ItemManager.java:291)
at org.apache.jackrabbit.core.SessionImpl.getItem(SessionImpl.java:764)
at info.magnolia.cms.core.ie.DataTransporter.importXmlStream(DataTransporter.java:265)
... 55 more