Puntuado con 5 de 5 estrellas

I got the OK of the author of this addon to integrate his code in the CompactHeader addon (https://addons.mozilla.org/thunderbird/addon/13564). He wrote me that he is not planing to further work on this addon. So for Thunderbird 3.0 the CompactHeader addon can be used as replacement. For Thunderbird 2.0.0.x you have to manually change a line in install.rdf to 2.0.0.*. To do this change the filename rss_linkify_subject-0.1-tb.xpi to rss_linkify_subject-0.1-tb.zip. Extract the install.rdf, edit the file and add it back to the zip file. Then rename the zip file back to rss_linkify_subject-0.1-tb.xpi