title: Ubuntu 16 LTS - Eclipse window preferences not working properly
body: <p>I've just installed Ubuntu 16.04 LTS.
  I downloaded a fresh Eclipse on March 2 for Linux 64-bit.</p>
  
  <p>I am using the latest Oracle hotspot JDK 1.8 update 91 release.</p>
  
  <p>The first thing I noticed, while trying to enable Eclipse general preferences to show stack usage, was that opening the preferences window took 30 seconds and clicking on the different tree elements has no effect on the content of the preferences screens.</p>
  
  <p>Other menus seem to be working properly, but this one in particular is going nowhere.</p>
  
  <p>Has anybody else experienced this problem, and how can I solve it?</p>