I get this error when I run a certain Spring Web 3 project in NetBeans:
org.xml.sax.SAXParseException; lineNumber: 11; columnNumber: 30; The prefix \"
You are probably missing some significant portion of the namespace declaration, as discussed here: http://forum.springsource.org/showthread.php?100397-The-prefix-mvc-for-element-mvc-annotation-driven-is-notbound
It does not effect runtime, but the development environment will suffer with similar problems as you describe.
I guess it should go this way: http://www.springframework.org/schema/aop/spring-aop-3.0.xsd