I updated my eclipse plugin for Jaspersoft Studio to version 1.1.2. This automatically introduces UUID attributes to most elements in the JRXML file, but the compiler complains about them. So you cannot compile to a .jasper file.
The error is: org.xml.sax.SAXParseException: cvc-complex-type.3.2.2: Attribute 'uuid' is not allowed to appear in element 'jasperReport'.
The Jaspersoft versions in eclipse are:
Jaspersoft Studio 1.1.2
Eclipse Jetty additional integrations 1.1.2
Mortbay Jetty additional integrations 1.1.2