Got this when I tried to open an xml file (struts-config.xml to be precise). An internal error dialog was displayed and couldn't be closed. Had to shut down Idea through task manager.
[ 53357] ERROR - intellij.plugins.PluginManager -
[ 53357] ERROR - intellij.plugins.PluginManager - IntelliJ IDEA (Ariadna) Build #616
[ 53367] ERROR - intellij.plugins.PluginManager - JDK: 1.3.1_02
[ 53367] ERROR - intellij.plugins.PluginManager - VM: Java HotSpot(TM) ClientVM
[ 53367] ERROR - intellij.plugins.PluginManager - Vendor: Sun Microsystems Inc.
[ 53367] ERROR - intellij.plugins.PluginManager - OS: Windows NT
[ 53367] ERROR - intellij.plugins.PluginManager -
java.lang.NullPointerException
at com.intellij.xml.a.b.b.<init>(b.java:21)
at com.intellij.xml.e.c(e.java:114)
at com.intellij.xml.e.a(e.java:29)
at com.intellij.codeInsight.daemon.impl.cj.d(cj.java:55)
at com.intellij.codeInsight.daemon.impl.cj.b(cj.java:113)
at com.intellij.codeInsight.daemon.impl.cj.a(cj.java:131)
at com.intellij.psi.impl.source.e.q.a(q.java:3)
at com.intellij.codeInsight.daemon.impl.cg.a(cg.java:274)
at com.intellij.psi.t.a(t.java:109)
at com.intellij.psi.impl.source.e.q.a(q.java:3)
at com.intellij.codeInsight.daemon.impl.h.a(h.java:93)
at com.intellij.codeInsight.daemon.impl.h.run(h.java:105)
at com.intellij.openapi.a.a.b.a(b.java:222)
at com.intellij.codeInsight.daemon.impl.cl.b(cl.java:53)
at com.intellij.codeInsight.daemon.impl.cl.a(cl.java:58)
at com.intellij.codeInsight.daemon.impl.cl.a(cl.java:41)
at com.intellij.codeInsight.daemon.impl.bu.run(bu.java)
at com.intellij.progress.ProgressManager.a(ProgressManager.java:2)
at com.intellij.codeInsight.daemon.impl.cl.run(cl.java:42)
