title: Could not calculate build plan with SpringSource Tool Suite
body: <p>I'm having some troubles with IDE configurations. I can't update my maven project. </p>
  
  <pre><code>Could not calculate build plan: Failed to parse plugin descriptor for org.apache.maven.plugins:maven-war-plugin:2.1.1 (C:\Users\dolgopolov.a\.m2\repository\org\apache\maven\plugins\maven-war-plugin\2.1.1\maven-war-plugin-2.1.1.jar): invalid LOC header (bad signature)
  Failed to parse plugin descriptor for org.apache.maven.plugins:maven-war-plugin:2.1.1 (C:\Users\dolgopolov.a\.m2\repository\org\apache\maven\plugins\maven-war-plugin\2.1.1\maven-war-plugin-2.1.1.jar): invalid LOC header (bad signature)
  </code></pre>
  
  <p>at <code>pom.xml</code>:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
  &lt;project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"&gt;
  </code></pre>
  
  <p>Marker is locating near <code>xml version</code> and <code>xmlns</code>. It says:</p>
  
  <pre><code>The word 'xml' is not correctly spelled
  The word 'xmlns' is not correctly spelled
  </code></pre>
  
  <p>What's wrong with sts?</p>