Looks like that jar coming from the link is a really old one - last entry in changelog is from December 2012 lol. Its the one linked to by the updater.jnlp so thats pretty strange
edit: wonder if this has anything to do with it:
http://odditown.taggedup.com/ender/salem/salem.jar
link is in the config.xml of the updater.jar referenced by the updater.jnlp... suspended page?