title: Magento - Customer login won't work on Onepage Checkout after 1.8.1 update from 1.7
body: <p>After updating Magento from 1.7 to 1.8.1, I found myself correcting most of the <code>formkey</code> issues on my custom theme. I think everything now works correctly except for one thing: the customer login on the onepage checkout page doesn't seem to do anything. The problem seems really odd to me since the customer login works everywhere else on the site.</p>
  
  <p>I use a module (Crius SkipStep1) to skip the first step and instead show the guest billing &amp; shipping method first (with possibility of switching to the login system if wanted). 
  Using it or the default login system doesn't seem to do any difference; the problem is there in both cases. After login, the page reloads but doesn't show me anything more than before. </p>
  
  <p>With the module, the <code>checkout/onepage/saveMethod/</code> function runs after the page reloads. Without the module, nothing happens. In both cases, I can still do the guest checkout method without any issue.</p>
  
  <p>And the odd thing is that if I type the password wrong, the page reloads normally and the error message for incorrect password shows up. I tried testing the default and base themes, and the problem occurs anyway despite the template files being up to date.</p>
  
  <p>I think I tried everything and don't see what to do anymore, so I need help from fresh eyes.</p>
  
  <p>Thanks.</p>