Problem in creating the Request error

I get the following error when uploading images (text is fine) in the
Cocoon2.1.3 Linotype sample. It once worked and I think its a permissions
issue. Can anyone give me some pointers?

Linc

----------------------------------------
Problem in creating the Request
Message: Malformed stream: No such file or directory

Description: org.apache.cocoon.servlet.multipart.MultipartException:
Malformed stream: No such file or directory

Sender: org.apache.cocoon.servlet.CocoonServlet

Source: Cocoon Servlet

cause

org.apache.cocoon.servlet.multipart.MultipartException: Malformed stream: No
such file or directory
request-uri

/samples/linotype/private/edit/news/4/631389163153397c522a2d1c524e477a647563
48.kont
stacktrace

org.apache.cocoon.servlet.multipart.MultipartException: Malformed stream: No
such file or directory
	at
org.apache.cocoon.servlet.multipart.MultipartParser.parsePart(MultipartParse
r.java:215)
	at
org.apache.cocoon.servlet.multipart.MultipartParser.parseMultiPart(Multipart
Parser.java:168)
	at
org.apache.cocoon.servlet.multipart.MultipartParser.getParts(MultipartParser
.java:141)
	at
org.apache.cocoon.servlet.multipart.MultipartParser.getParts(MultipartParser
.java:147)
	at
org.apache.cocoon.servlet.multipart.RequestFactory.getServletRequest(Request
Factory.java:121)
	at org.apache.cocoon.servlet.CocoonServlet.service(CocoonServlet.java:1019)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
	at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:360)
	at
org.mortbay.jetty.servlet.WebApplicationHandler.dispatch(WebApplicationHandl
er.java:294)
	at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:558)
	at org.mortbay.http.HttpContext.handle(HttpContext.java:1714)
	at
org.mortbay.jetty.servlet.WebApplicationContext.handle(WebApplicationContext
.java:507)
	at org.mortbay.http.HttpContext.handle(HttpContext.java:1664)
	at org.mortbay.http.HttpServer.service(HttpServer.java:863)
	at org.mortbay.http.HttpConnection.service(HttpConnection.java:775)
	at org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:939)
	at org.mortbay.http.HttpConnection.handle(HttpConnection.java:792)
	at
org.mortbay.http.SocketListener.handleConnection(SocketListener.java:201)
	at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:289)
	at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:455)

Apache Cocoon 2.1.3