title: Error after upgrading Joomla 3.1.5 to 3.2.3 - what's the proper method?
body: <p>I've tried every method I can think of to update from 3.1.5 to 3.2.3 and each time it pretty much kills my site and leaves me with the error:</p>
  
  <p>Fatal error: Call to undefined method JLoader::registerAlias() in /homepages/.../libraries/cms.php on line 61</p>
  
  <p>At which point I just clobber the rest of the site and reinstall my backup (oh man you GOTTA LOVE Akeeba).</p>
  
  <p>I've upgraded Joomla successfully and unsuccessfully about 100 times over the past few years on various sites and this is the first time I'm stumped as how to move forward.</p>
  
  <p>One interesting piece of data is in the Admin Control Panel of the 3.1.5 is that the Joomla version says "Unknown" even though the System Information lists it as 3.1.5.</p>
  
  <p>So, anyway, what is the ABSOLUTE, BLESSED method for moving from 3.1.5 to 3.2.3? If I should simply be able to install the 3.2.3 upgrade zip file then I guess I'm toast. In that case, what would happen if I left the database as is and cleared out all the files and then installed the 3.2.3 full stable package? Would that work?</p>