Comment #5 on issue 492 by tudor.gi...@gmail.com: Glamour browsers do not release all subscriptions to announcer objects http://code.google.com/p/moose-technology/issues/detail?id=492
I am not exactly sure what the test tests, given that the presentation is not the presentation that gets in the actual pane.
Try this in the test: self assert: (presentation = browser panes first presentations first).