Eclipse won't start after upgrading ADT (Android Development Toolkit)
<p>I'm using Eclipse 3.5 (on MacOS 64-bit) and had the ADT installed, and things were working.</p>

<p>I attempted to update the ADT and after the update my Eclipse would no longer start.  The error in the log file is</p>

<pre><code>java.lang.ClassNotFoundException: org.eclipse.core.runtime.adaptor.EclipseStarter 
at java.net.URLClassLoader$1.run(URLClassLoader.java:202) 
at java.security.AccessController.doPrivileged(Native Method) 
at java.net.URLClassLoader.findClass(URLClassLoader.java:190) 
at java.lang.ClassLoader.loadClass(ClassLoader.java:307) 
at java.lang.ClassLoader.loadClass(ClassLoader.java:248) 
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:556) 
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:514) 
at org.eclipse.equinox.launcher.Main.run(Main.java:1311)
</code></pre>

<p>To work around this, I've re-installed Eclipse 3.5.</p>

<p>Anyone else having this problem?</p>

<p>NOTE: I tried the suggestions in <a href="http://stackoverflow.com/questions/2493415/i-am-getting-a-following-error-while-launching-my-eclipse">I am getting a following error while launching my eclipse</a>
but (starting with -clean did not work, nor did changing the startup property).</p>
