title: How to revert to old revision and then get back to HEAD revision
body: <p>I'm new to using TortoiseSVN (have used TortoiseHG before) and I'm having some problems going back and forth between different revisions. </p>
  
  <p>So for example if I'm working on my project and I notice a bug. I then want to see if this bug was also there 1 week ago. I right click on my project map and choose  TortoiseSVN->Show log. Then I find a reviosn from a week ago and right click and select Revert to this revision. So far all good. I then see that the bug was indeed still there, I just hadn't noticed it, so now I want to go back to the HEAD revision. This is where I start to get problems. First of all when I open the Show log the bold text indicates that I'm still in the HEAD revision. If I right click on the project map and choose SVN Update it just says that I already have the HEAD revision and nothing happens. I then try to open the log, right click on the last revision and select Revert to this revision. This doesn't work either. At this point I'm frustrated nothing works, deletes my folder and does a SVN Checkout from the HEAD revision and then i can continue working. </p>
  
  <p>What am I doing wrong?</p>