Consider this:

package test62

class GBean {
	String fooBar
	String bar
}

and this:

package test62
class Test62 {
	void doSomething() {
		def g = new GBean()
		g.with { 
			fooBar = 'foo'
			bar = 'bar'
		}
	}
}

Now go to GBean, highlight GBean.fooBar, hit Alt+Shift+R and rename fooBar to foo: the reference in Test62.doSomething() is not renamed.
The strange thing is that if you do the opposite (source is foo, rename to fooBar), it works correctly.

Another strange behaviour (but I think it's for the same reason): if you issue Alt+Shift+R from Test62 instead of GBean and you try to rename fooBar to foo, after the operation is finished the editor replaces foo with fooBar.