Crash when user has not made a single changeset yet

[anonymous]

What steps will reproduce the problem?

1. Having defined no own changeset so far
2. Open 'Changeset administration' Änderungssatzverwaltung (Changeset manager)
3. Click 'my changesets'

What is the expected result?

none

What happens instead?

messsagebox: error ...

Please provide any additional information below. Attach a screenshot if
possible.

Repository Root: http://josm.openstreetmap.de/svn
Build-Date: 2010-07-17 01:31:31
Last Changed Author: bastiK
Revision: 3376
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
URL: http://josm.openstreetmap.de/svn/trunk
Last Changed Date: 2010-07-16 23:44:00 +0200 (Fri, 16 Jul 2010)
Last Changed Rev: 3376

Identification: JOSM/1.5 (3376 de)
Memory Usage: 58 MB / 494 MB (22 MB allocated, but free)
Java version: 1.6.0_20, Sun Microsystems Inc., Java HotSpot(TM) Client VM
Operating system: Windows 7
Dataset consistency test: No problems found

Plugin: openstreetbugs (22466)
Plugin: remotecontrol (22734)
Plugin: validator (22445)
Plugin: wmsplugin (22286)

java.lang.IllegalArgumentException: Expected non-empty value for parameter 'userName', got ''
	at org.openstreetmap.josm.gui.JosmUserIdentityManager.setPartiallyIdentified(JosmUserIdentityManager.java:86)
	at org.openstreetmap.josm.gui.JosmUserIdentityManager.initFromPreferences(JosmUserIdentityManager.java:177)
	at org.openstreetmap.josm.gui.dialogs.changeset.ChangesetCacheManager$DownloadMyChangesets.acti

[Cobra]

cannot reproduce with r4376