title: Eclipse CDT doesn't clear errors from previous builds
body: <p>Since upgrading to Eclipse Juno (Eclipse CDT 6), I've noticed that, when I do a "make" for my makefile projects, errors from previous builds such as the following don't get cleared from my "Problems" list:</p>
  
  <pre><code>make: *** [Debug] Error 2
  make[1]: *** [util.o] Error 1
  make[1]: *** [record.o] Error 1
  </code></pre>
  
  <p>The individual compiler error messages from previous builds are cleared just fine, but the final, summary error messages that <code>make</code> prints whenever it encounters any errors are not.</p>
  
  <p>How do I get Eclipse to clear these errors as well?</p>