escape path name?

gistfile1.txt

org.jboss.errai.bus.client.api.base.MessageDeliveryFailure: error invoking endpoint
	at org.jboss.errai.bus.server.io.ConversationalEndpointCallback.callback(ConversationalEndpointCallback.java:125)
	at org.jboss.errai.bus.server.io.RemoteServiceCallback.callback(RemoteServiceCallback.java:54)
	at org.jboss.errai.cdi.server.CDIExtensionPoints$3.callback(CDIExtensionPoints.java:517)
	at org.jboss.errai.bus.client.framework.DeliveryPlan.deliver(DeliveryPlan.java:43)
	at org.jboss.errai.bus.server.ServerMessageBusImpl.sendGlobal(ServerMessageBusImpl.java:635)
	at org.jboss.errai.bus.server.SimpleDispatcher.dispatchGlobal(SimpleDispatcher.java:46)
	at org.jboss.errai.bus.server.service.ErraiServiceImpl.store(ErraiServiceImpl.java:94)
	at org.jboss.errai.bus.server.service.ErraiServiceImpl.store(ErraiServiceImpl.java:108)
	at org.jboss.errai.bus.server.servlet.DefaultBlockingServlet.doPost(DefaultBlockingServlet.java:117)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1097)
	at org.jboss.resteasy.plugins.server.servlet.FilterDispatcher.doFilter(FilterDispatcher.java:63)
	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1088)
	at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:360)
	at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
	at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
	at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:729)
	at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
	at org.mortbay.jetty.handler.RequestLogHandler.handle(RequestLogHandler.java:49)
	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
	at org.mortbay.jetty.Server.handle(Server.java:324)
	at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505)
	at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:843)
	at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:647)
	at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
	at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
	at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)
	at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488)
Caused by: java.lang.IllegalArgumentException
	at java.net.URI.create(URI.java:842)
	at org.drools.java.nio.fs.BasePath.toUri(BasePath.java:261)
	at org.drools.java.nio.fs.BasePath.toUriAsString(BasePath.java:359)
	at org.drools.guvnor.vfs.ExtendedPathVO.<init>(ExtendedPathVO.java:53)
	at org.drools.guvnor.vfs.DirectoryStreamVO.<init>(DirectoryStreamVO.java:36)
	at org.drools.guvnor.server.impl.VFSServicesServerImpl.newDirectoryStream(VFSServicesServerImpl.java:69)
	at org.drools.guvnor.server.impl.VFSServicesServerImpl$Proxy$_$$_WeldClientProxy.newDirectoryStream(VFSServicesServerImpl$Proxy$_$$_WeldClientProxy.java)
	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:597)
	at org.jboss.errai.bus.server.io.ConversationalEndpointCallback.callback(ConversationalEndpointCallback.java:107)
	... 30 more
Caused by: java.net.URISyntaxException: Illegal character in path at index 30: default:///home/manstis/Ubuntu One
	at java.net.URI$Parser.fail(URI.java:2809)
	at java.net.URI$Parser.checkChars(URI.java:2982)
	at java.net.URI$Parser.parseHierarchical(URI.java:3066)
	at java.net.URI$Parser.parse(URI.java:3014)
	at java.net.URI.<init>(URI.java:578)
	at java.net.URI.create(URI.java:840)