title: VirtualBox - Synchronisation problems
body: <p>I got <strong>VirtualBox</strong> running on <strong>Windows 7</strong> host, running <strong>Ubuntu</strong> servers and <strong>XP-SP3</strong> clients.</p>
  
  <p>Often I note that the clock on the guest machines is strictly late in comparison to the host time. 
  I first noted it when I got wierd benchmarking results for all kind of performance tests, and assumed that compare tests on the same machine to themselves would be OK - which is not.</p>
  
  <p>The situation gets worse when client-server tests are involed. It  might have been acceptable if all the guests would retain the same delay, but I run into situations where the time on the XP clients is more advanced on the servers, and situation that the time on the Ubuntu servers is more advanced then on the xp clients.</p>
  
  <p>In a sense I could live with that - because it presents interesting test cases - but sometimes it gets to differences of 20 minuets.</p>
  
  <p>I tried fidlling with the configuration for no avail - but I aught to be missing something...</p>
  
  <p>Anybody?
  Thanks in advance.</p>