ERROR  info.magnolia.module.rssaggregator.util.MagnoliaTemplate 16.08.2013 08:54:40 -- Failed to map content 'data:/rssaggregator/MagnoliaBlogs/data/channel-04/entry-17[dataItemNode]' using mapper 'class info.magnolia.module.rssaggregator.generator.RSSModuleFeedGenerator$FeedEntryMapper'
javax.jcr.ValueFormatException: property /rssaggregator/MagnoliaBlogs/data/channel-04/entry-17/categories/jcr:mixinTypes is a multi-valued property, so it's values can only be retrieved as an array
	at org.apache.jackrabbit.core.PropertyImpl.internalGetValue(PropertyImpl.java:483)
	at org.apache.jackrabbit.core.PropertyImpl.getValue(PropertyImpl.java:510)
	at org.apache.jackrabbit.core.PropertyImpl.getString(PropertyImpl.java:520)
	at info.magnolia.jcr.wrapper.DelegatePropertyWrapper.getString(DelegatePropertyWrapper.java:163)
	at info.magnolia.jcr.wrapper.DelegatePropertyWrapper.getString(DelegatePropertyWrapper.java:163)
	at info.magnolia.module.rssaggregator.generator.RSSModuleFeedGenerator$FeedEntryMapper.map(RSSModuleFeedGenerator.java:138)
	at info.magnolia.module.rssaggregator.generator.RSSModuleFeedGenerator$FeedEntryMapper.map(RSSModuleFeedGenerator.java:118)
	at info.magnolia.module.rssaggregator.util.MagnoliaTemplate.query(MagnoliaTemplate.java:110)
	at info.magnolia.module.rssaggregator.util.MagnoliaTemplate.queryForList(MagnoliaTemplate.java:67)
	at info.magnolia.module.rssaggregator.util.MagnoliaTemplate.xpathQueryForList(MagnoliaTemplate.java:80)
	at info.magnolia.module.rssaggregator.generator.RSSModuleFeedGenerator.loadFeedEntries(RSSModuleFeedGenerator.java:110)
	at info.magnolia.module.rssaggregator.generator.AbstractSyndFeedGenerator.generate(AbstractSyndFeedGenerator.java:74)
	at info.magnolia.module.rssaggregator.servlet.FeedSyndicationServlet.handleRequest(FeedSyndicationServlet.java:76)
	at info.magnolia.module.rssaggregator.servlet.AbstractServlet.processRequest(AbstractServlet.java:83)
	at info.magnolia.module.rssaggregator.servlet.AbstractServlet.doGet(AbstractServlet.java:58)