Install a JBossAS plugin ( Version: 2.0.0.CR2-R200901280154) by Eclipse software update from (http://download.jboss.org/jbosstools/updates/development) into the Eclipse 3.4.2 (Build id: M20090211-1700). Then open "JBoss Server View", move mouse onto the tab title "JBoss Server View" (yes, directly onto this title). And you should see a tooltip. Do you see the same error like me? I have observed two other things: "Server Log" view title has no tooltip. "MBean Explorer" has a tooltip: "Error: no label provider for org.jboss.tools.jmx.ui.internal.views.navigator.JMXNavigator@...." (I hope i have rewritten it correctly). I have also installed JMX Console plugin (also by the software updates). View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4216647#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...