can't extend AbstractTransactionalJUnit4SpringContextTests

I'm trying to extend the spring unit test abstract class AbstractTransactionalJUnit4SpringContextTests, but eclipse complains of an inconsistent type hierarchy. I've reduced the problem down to a real simple example:

package com.test;

import org.springframework.test.context.junit4.AbstractTransactionalJUnit4SpringContextTests;

public class HooHa extends AbstractTransactionalJUnit4SpringContextTests {

}

I have spring-test-3.0.5.RELEASE.jar on the classpath for the project, so eclipse is finding the class, it just doesn't like it.

The error message that eclipse gives is:

The hierarchy of the type HooHa is inconsistent

Any help or insight anyone can provide would be greatly appreciated.