Confusing module enter behavior

Hi,

Today I wanted to try out the develop-test style flow using enter and
found these results which were not what I expected:

1.	Create foo.rkt. Define method foo which returns 1
2.	Create foo-test.rkt. Add test for foo which should return 0
3.     In foo-test, C:c, C:a; test fails as expected
4. 	In foo, change result to 0
5.	In foo-test, C:c, C:a; test passes as expected
6.     In foo, change result to 1
7.	In foo-test, C:c, C:a; test passes, which is not expected.
	The reason is that I can see in the repl that
	[re-loading c:\dev\tmp\enter\foo.rkt]
	occurs; as the docs for enter! explain.
	Evaluating (foo) in the repl also returns one, so the test
	should have failed. Even C:x,C:e on the (foo) in the test
	returns one.

What is odd is that I can see the new definition gets loaded, but
something still isn't right.

Emacs 23.3.1, Geiser 0.1.3, Windows XP, and Racket 5.2.h

;;; foo.rkt
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
#lang racket

(provide (all-defined-out))