Cannot open .jar with right-click > open with "sun java 6 runtime"

I think this causes the problem:

$ cat /usr/share/applications/sun-java6-java.desktop
[Desktop Entry]
Encoding=UTF-8
Name=Sun Java 6 Runtime
Comment=Sun Java 6 Runtime
Exec=@java_launcher@ -jar
Terminal=false
Type=Application
Icon=sun-java6
MimeType=application/x-java-archive;application/java-archive;application/x-jar;
NoDisplay=true

What's @java_launcher@ ?

It looks like the debian/rules has this (from the diff.gz):

+debian/control: debian/control.in debian/rules
+ @cp -p debian/control debian/control.old
+ sed -e 's/@JRE@/$(p_jre)/g' \
+ -e 's/@JDK@/$(p_jdk)/g' \
+ -e 's/@vendor@/$(Vendor)/g' \
+ -e 's/@basename@/$(basename)/g' \
+ -e 's,@basedir@,$(basedir),g' \
+ -e 's/@srcname@/$(srcname)/g' \
+ -e 's/@arch@/$(DEB_HOST_ARCH)/g' \
+ -e 's/@sarch@/$(arch)/g' \
+ -e 's/@RELEASE@/$(relstring)/g' \
+ -e 's/@archdir@/$(archdir)/g' \
+ -e 's/@browsers@/$(browsers)/g' \
+ -e 's,@java_launcher@,$(java_launcher),g' \
+ -e 's/@cjk_fonts@/$(cjk_fonts)/g' \
+ -e 's,@pkg_version@,$(if $(filter $(distrelease),etch dapper edgy feisty gutsy),$${Source-Version},$${source:Version}),g' \
+ debian/control.in > debian/control

But I think I don't see a sed command to replace "@java_launcher@" in file debian/JB-java.desktop.in

6.20dlj-1ubuntu3 was just released to lucid, now will there be another update against earlier released 6.20dlj-0ubuntu1.9.10 for karmic? I don't see the change note from lucid in the karmic pac. Heavy going today... ;)

Confirming it's fixed for lucid. The launchpad janitor for some reason didn't update it.

I think the karmic package is *not* affected:

~/Desktop/sun-java6-bin_6.20dlj-0ubuntu1.9.10_amd64/data$ cat ./usr/share/applications/sun-java6-java.desktop
[Desktop Entry]
Encoding=UTF-8
Name=Sun Java 6 Runtime
Comment=Sun Java 6 Runtime
Exec=/usr/lib/jvm/java-6-sun-1.6.0.20/bin/java -jar
Terminal=false
Type=Application
Icon=sun-java6
MimeType=application/x-java-archive;application/java-archive;application/x-jar;
NoDisplay=true