title: Eclipse plug-ins disappeared after update
body: <p>Have been updated Eclipse PDT using <code>Window-&gt;Check for Updates</code> feature.
  After restart all trird-party plug-ins seems like switched off.</p>
  
  <p>Starting with <code>-clean</code> command line key doesn't helps.</p>
  
  <p><code>Eclipse Installation Detals</code> contains information about all my plug-ins correctly.</p>
  
  <hr>
  
  <p>Error log: </p>
  
  <pre><code>eclipse.buildId=M20090917-0800
  java.version=1.6.0_05
  java.vendor=Sun Microsystems Inc.
  BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=ru_RU
  Framework arguments:  -product org.eclipse.epp.package.php.product
  Command-line arguments:  -os win32 -ws win32 -arch x86 -product org.eclipse.epp.package.php.product
  
  !ENTRY org.eclipse.team.core 4 0 2009-11-24 12:52:00.804
  !MESSAGE Could not instantiate provider org.eclipse.team.svn.core.svnnature for project Search.
  !STACK 1
  org.eclipse.team.core.TeamException: Could not instantiate provider org.eclipse.team.svn.core.svnnature for project Search.
      at org.eclipse.team.core.RepositoryProvider.mapNewProvider(RepositoryProvider.java:165)
      at org.eclipse.team.core.RepositoryProvider.mapExistingProvider(RepositoryProvider.java:235)
      at org.eclipse.team.core.RepositoryProvider.getProvider(RepositoryProvider.java:507)
      at org.eclipse.team.internal.ccvs.ui.CVSLightweightDecorator.isMappedToCVS(CVSLightweightDecorator.java:192)
      at org.eclipse.team.internal.ccvs.ui.CVSLightweightDecorator.decorate(CVSLightweightDecorator.java:147)
      at org.eclipse.ui.internal.decorators.LightweightDecoratorDefinition.decorate(LightweightDecoratorDefinition.java:263)
      at org.eclipse.ui.internal.decorators.LightweightDecoratorManager$LightweightRunnable.run(LightweightDecoratorManager.java:81)
      at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
      at org.eclipse.ui.internal.decorators.LightweightDecoratorManager.decorate(LightweightDecoratorManager.java:365)
      at org.eclipse.ui.internal.decorators.LightweightDecoratorManager.getDecorations(LightweightDecoratorManager.java:347)
      at org.eclipse.ui.internal.decorators.DecorationScheduler$1.ensureResultCached(DecorationScheduler.java:371)
      at org.eclipse.ui.internal.decorators.DecorationScheduler$1.run(DecorationScheduler.java:331)
      at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)
  !SUBENTRY 1 org.eclipse.team.core 4 0 2009-11-24 12:52:00.804
  !MESSAGE Could not instantiate provider org.eclipse.team.svn.core.svnnature for project Search.
  </code></pre>