auto completion: last entered tags not remembered after restart.

[skyper]

What steps will reproduce the problem?

1. have the add value option set to remember list
2. add a tag (e.g. addr:housenumber=*)
3. exit JOSM
4. start JOSM
5. add tag (e.g. addr:housenumber=*)

What is the expected result?

as the highest entry in the list is addr:housenumber=* typing "add" should be enough to get it right.

What happens instead?

addr:city is suggested though I did not use this key for a week or even longer.

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

Repository Root: http://josm.openstreetmap.de/svn
Build-Date: 2015-04-07 08:40:02
Last Changed Author: stoecker
Revision: 8175
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Relative URL: ^/trunk
URL: http://josm.openstreetmap.de/svn/trunk
Last Changed Date: 2015-04-07 10:18:15 +0200 (Tue, 07 Apr 2015)
Last Changed Rev: 8175

Identification: JOSM/1.5 (8175 en) Linux Debian GNU/Linux 7.8 (wheezy)
Memory Usage: 517 MB / 882 MB (188 MB allocated, but free)
Java version: 1.7.0_75, Oracle Corporation, OpenJDK 64-Bit Server VM
Java package: openjdk-7-jre:amd64-7u75-2.5.4-1~deb7u1
Dataset consistency test: No problems found

Plugins:
- OpeningHoursEditor (30962)
- conflation (0.1.7)
- download_along (30892)
- imagery-xml-bounds (31019)
- imagery_offset_db (31056)
- jts (31002)
- mirrored_download (30962)
- photoadjust (30964)
- reverter (30990)
- tag2link (31066)
- terracer (30892)
- todo (29154)
- undelete (30892)
- utilsplugin2 (31072)
- waydownloader (30892)
- wikipedia (31035)