Hi, got myself a shiny new apache-tomcat-7.0.39.tar.gz and JSPWiki-2.9.1-incubating-4-bin.zip followed the Really simple installation in README, it actually almost worked, the step for unzipping the core pages is missing.
I first did not understand that the Install.jsp had done its work, it should say that Installer is done, restart the container and give a link to the new Wiki Installation. The Installation works, but https://issues.apache.org/jira/browse/JSPWIKI-396 appears now with tomcat-7.0.39, too. The logs show May 03, 2013 8:38:44 AM org.apache.catalina.session.StandardManager doLoad SEVERE: IOException while loading persisted sessions: java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException: org.apache.wiki.auth.UserManager$JSONUserModule java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException: org.apache.wiki.auth.UserManager$JSONUserModule ... This is harmless, but puzzles new users, it should be fixed. Greetings, Juergen