Today I was going crazy because whenever I tried to update customer information from admin it was redirecting me to admin dashboard. It was working perfectly on previous server and on my local. After debugging for a while I couldn't find the solution for the issue at all.
Our client wanted to integrate mailchimp with magento. So I dig for extension and found this awesome free magento extension called mageMonkey. I installed it through magento connect using key: http://connect20.magentocommerce.com/community/Ebizmarts_MageMonkey
Magento core url helper allows you to get current url.
To get current url in magento you just need one line of code as below:
ref: public function getCurrentUrl()
$magentoCurrentUrl = Mage::helper('core/url')->getCurrentUrl();