Cancelling authentication while quitting throws an exception

[jkj@…]

1. Start web start version and do some changes
2. Select File -> Close open changesets
3. Cancel "Enter credentials for OSM API"
4. Receive "Unexpected Exception"

org.openstreetmap.josm.io.OsmTransferCancelledException

at org.openstreetmap.josm.io.OsmServerReader.getInputStreamRaw(OsmServerReader.java:76)
at org.openstreetmap.josm.io.OsmServerReader.getInputStream(OsmServerReader.java:48)
at org.openstreetmap.josm.io.OsmServerUserInfoReader.fetchUserInfo(OsmServerUserInfoReader.java:127)
at org.openstreetmap.josm.actions.CloseChangesetAction$DownloadOpenChangesetsTask.fetchUserInfo(CloseChangesetAction.java:124)
at org.openstreetmap.josm.actions.CloseChangesetAction$DownloadOpenChangesetsTask.realRun(CloseChangesetAction.java:130)
at org.openstreetmap.josm.gui.PleaseWaitRunnable.doRealRun(PleaseWaitRunnable.java:83)
at org.openstreetmap.josm.gui.PleaseWaitRunnable.run(PleaseWaitRunnable.java:129)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:680)

Repository Root: http://josm.openstreetmap.de/svn
Build-Date: 2010-10-06 01:31:17
Last Changed Author: bastiK
Revision: 3592
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
URL: http://josm.openstreetmap.de/svn/trunk
Last Changed Date: 2010-10-05 20:34:31 +0200 (Tue, 05 Oct 2010)
Last Changed Rev: 3592

Identification: JOSM/1.5 (3592 en)
Memory Usage: 123 MB / 123 MB (36 MB allocated, but free)
Java version: 1.6.0_22, Apple Inc., Java HotSpot(TM) 64-Bit Server VM
Operating system: Mac OS X
Dataset consistency test: No problems found