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java.io.InvalidClassException: com.sun.java.util.collections.AbstractList; IllegalAccessException	at java.io.ObjectInputStream.inputObject(ObjectInputStream.java)	at java.io.ObjectInputStream.readObject(ObjectInputStream.java)	at java.io.ObjectInputStream.readObject(ObjectInputStream.java)	at com.dailyiowan.ontheline.OnTheLine.readChoiceList(OnTheLine.java)	at com.dailyiowan.ontheline.OnTheLine.doPost(OnTheLine.java)	at com.dailyiowan.ontheline.OnTheLine.doGet(OnTheLine.java)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:516)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:611)	at com.livesoftware.jrun.JRun.runServlet(JRun.java)	at com.livesoftware.jrun.JRunGeneric.handleConnection(JRunGeneric.java)	at com.livesoftware.jrunwebstar.JRunWebStar.HandleConnection(JRunWebStar.java)