title: IntelliJ fails to sync changes in the target folder
body: <p>Intellij 12.0.4 (build 123.169) on Linux Mint 13.</p>
  
  <p>When I run maven tests from command line, I can see the changed contents of the <code>target</code> folder in the file explorer, but not in IntelliJ.</p>
  
  <p>I have tried the <code>Synchronize</code> option from the context menu as well as the Ctrl+Alt+Y shortcut on different levels - subfolder, folder and module. I also cannot open the files using the Ctrl+Shift+N open/search.</p>
  
  <p>The idea.log looks unsuspicious:</p>
  
  <pre><code>2013-04-01 08:51:07,808 [3911692]   INFO - indexing.UnindexedFilesUpdater - Indexable files iterated in 26 ms 
  2013-04-01 08:51:07,808 [3911692]   INFO - indexing.UnindexedFilesUpdater - Unindexed files update started: 0 files to update 
  2013-04-01 08:51:07,808 [3911692]   INFO - indexing.UnindexedFilesUpdater - Unindexed files update done in 0 ms 
  </code></pre>
  
  <p>Is there anything else I can do?</p>