I'm using Opera. Thanks for the experimentation.
Did you see anything about the bracketed numbers next to the associated words?
Also, Andreas does imply that his assocations seed is being built dynamically and says specifically that it's pruned for "bad" words every hour.
He also writes that the "top 100" is for the last 24 hours.
I'm speculating that those bracketed numbers means the number of hits to an association term, perhaps updated in batch every 24 hours?