Event Registration Confirm/Thank You pages show incorrect currency

The event registration confirmation/thank you pages display the incorrect currency. Steps to reproduce:

• Create a new event with a non-default currency (in my case EUR)
• Add a price set to fees and allow registration

The main event page, confirmation and thank you pages will all show the incorrect currency.

We fixed this for a client by doing the following:

diff --git a/sites/all/modules/contrib/civicrm/CRM/Event/Form/Registration.php b/sites/all/modules/contrib/civicrm/CRM/Event/Form/Registration.php
index 74526af6a..947cc051e 100644
--- a/sites/all/modules/contrib/civicrm/CRM/Event/Form/Registration.php
+++ b/sites/all/modules/contrib/civicrm/CRM/Event/Form/Registration.php
@@ -452,6 +452,8 @@ class CRM_Event_Form_Registration extends CRM_Core_Form {
       }
     }
 
+    $this->assign('currency', $params['currencyID']);
+
     $this->assign('address', CRM_Utils_Address::getFormattedBillingAddressFieldsFromParameters($params, $this->_bltID));
 
     // The concept of contributeMode is deprecated.

The problem is that templates/CRM/Price/Form/LineItem.tpl uses the $currency variable, but Event/Form/Registration.php sets $currencyID and not $currency

However, it still doesn't work for on-the-fly (non-price-set) prices.

This bug may be related to the following:

• #2930 (closed)
• #411