title: Magento Customer Account Sharing across multiple websites
body: <p>I have a single magento installation <strong>(ver 1.6)</strong> and created 3 websites for USA, UK and Europe each has its own store and store view I want to implement multi-currency and sharing one shopping cart among all these three websites. Everything is fine but when I select </p>
  
  <blockquote>
    <p>System>Configuration>Default>Customer Configuration>Share Customer
    Accounts to <strong>Global</strong></p>
  </blockquote>
  
  <p>, I get the following error after successful login tries to redirect customer </p>
  
  <p><strong>Fatal error: Cannot unset string offsets in /home/wwwabc/public_html/lib/Varien/Object.php on line 293</strong></p>
  
  <p>Sometimes login successfully redirect to My Account page and this error displayed when customer clicks on "Logout" I think there is some session/cookie issue but could not figure it out. </p>
  
  <p>Anyone can help quickly please...?</p>