From Frost: missing USKFetcher removal?

Did you see this message from Frost? Is he right?

----- Jano@vKDFgv2GdJjiIWSG0rZpzM55_Ps ----- 2007.02.13 - 14:47:52GMT -----

I don't have bookmarks. But even then, I don't understand why the
USKChecker counts don't go down. See this new graph from the latest
hours. I've launched fetchs for ~300 different USKs some hours ago.
I'd expect the USKChecker count to reach some plateau and start
dropping after a while...

----- Jano@vKDFgv2GdJjiIWSG0rZpzM55_Ps ----- 2007.02.13 - 18:36:47GMT -----

I've inspected the USKManager a bit more and I've found that this method:

synchronized void finished(USKFetcher f) {
   USK u = f.getOriginalUSK();
   fetchersByUSK.remove(u);		
}

is the only place where a fetcher is removed from fetchersByUSK.
However, according to eclipse, there's no references to it. I.e.,
nobody is calling that method. After placing some logs in USKManager,
I indeed see that after retrieving some USK using the /-1/ edition
form, it remains in the fetchersByUSK collection.