Mage registry key "media_mobile_image_size" already exists

#0 /var/www/cykelsportnord.dk/public_html/app/Mage.php(223): Mage::throwException('Mage registry k...')
#1 /var/www/cykelsportnord.dk/public_html/app/code/local/Itactica/Intenso/Helper/Data.php(306): Mage::register('media_mobile_im...', Array)
#2 /var/www/cykelsportnord.dk/public_html/app/design/frontend/intenso/default/template/catalog/product/view/media.phtml(22): Itactica_Intenso_Helper_Data->getGalleryImagesHeight(Object(Varien_Data_Collection), Object(Mage_Catalog_Model_Product), 500)
#3 /var/www/cykelsportnord.dk/public_html/app/code/core/Mage/Core/Block/Template.php(241): include('/var/www/cykels...')
#4 /var/www/cykelsportnord.dk/public_html/app/code/core/Mage/Core/Block/Template.php(272): Mage_Core_Block_Template->fetchView('frontend/intens...')
#5 /var/www/cykelsportnord.dk/public_html/app/code/core/Mage/Core/Block/Template.php(286): Mage_Core_Block_Template->renderView()
#6 /var/www/cykelsportnord.dk/public_html/app/code/core/Mage/Core/Block/Abstract.php(923): Mage_Core_Block_Template->_toHtml()
#7 /var/www/cykelsportnord.dk/public_html/app/code/core/Mage/Core/Block/Abstract.php(641): Mage_Core_Block_Abstract->toHtml()
#8 /var/www/cykelsportnord.dk/public_html/app/code/core/Mage/Core/Block/Abstract.php(585): Mage_Core_Block_Abstract->_getChildHtml('media', true)
#9 /var/www/cykelsportnord.dk/public_html/app/design/frontend/intenso/default/template/catalog/product/view.phtml(49): Mage_Core_Block_Abstract->getChildHtml('media')
#10 /var/www/cykelsportnord.dk/public_html/app/code/core/Mage/Core/Block/Template.php(241): include('/var/www/cykels...')
#11 /var/www/cykelsportnord.dk/public_html/app/code/core/Mage/Core/Block/Template.php(272): Mage_Core_Block_Template->fetchView('frontend/intens...')
#12 /var/www/cykelsportnord.dk/public_html/app/code/core/Mage/Core/Block/Template.php(286): Mage_Core_Block_Template->renderView()
#13 /var/www/cykelsportnord.dk/public_html/app/code/core/Mage/Core/Block/Abstract.php(923): Mage_Core_Block_Template->_toHtml()
#14 /var/www/cykelsportnord.dk/public_html/app/code/core/Mage/Core/Block/Text/List.php(43): Mage_Core_Block_Abstract->toHtml()
#15 /var/www/cykelsportnord.dk/public_html/app/code/core/Mage/Core/Block/Abstract.php(923): Mage_Core_Block_Text_List->_toHtml()
#16 /var/www/cykelsportnord.dk/public_html/app/code/core/Mage/Core/Block/Abstract.php(641): Mage_Core_Block_Abstract->toHtml()
#17 /var/www/cykelsportnord.dk/public_html/app/code/core/Mage/Core/Block/Abstract.php(585): Mage_Core_Block_Abstract->_getChildHtml('content', true)
#18 /var/www/cykelsportnord.dk/public_html/app/design/frontend/intenso/default/template/cms/default/no-route.phtml(31): Mage_Core_Block_Abstract->getChildHtml('content')
#19 /var/www/cykelsportnord.dk/public_html/app/code/core/Mage/Core/Block/Template.php(241): include('/var/www/cykels...')
#20 /var/www/cykelsportnord.dk/public_html/app/code/core/Mage/Core/Block/Template.php(272): Mage_Core_Block_Template->fetchView('frontend/intens...')
#21 /var/www/cykelsportnord.dk/public_html/app/code/core/Mage/Core/Block/Template.php(286): Mage_Core_Block_Template->renderView()
#22 /var/www/cykelsportnord.dk/public_html/app/code/core/Mage/Core/Block/Abstract.php(923): Mage_Core_Block_Template->_toHtml()
#23 /var/www/cykelsportnord.dk/public_html/app/code/core/Mage/Core/Model/Layout.php(555): Mage_Core_Block_Abstract->toHtml()
#24 /var/www/cykelsportnord.dk/public_html/app/code/core/Mage/Core/Controller/Varien/Action.php(390): Mage_Core_Model_Layout->getOutput()
#25 /var/www/cykelsportnord.dk/public_html/app/code/core/Mage/Cms/Helper/Page.php(137): Mage_Core_Controller_Varien_Action->renderLayout()
#26 /var/www/cykelsportnord.dk/public_html/app/code/core/Mage/Cms/Helper/Page.php(52): Mage_Cms_Helper_Page->_renderPage(Object(Mage_Cms_IndexController), 'no-route')
#27 /var/www/cykelsportnord.dk/public_html/app/code/core/Mage/Cms/controllers/IndexController.php(75): Mage_Cms_Helper_Page->renderPage(Object(Mage_Cms_IndexController), 'no-route')
#28 /var/www/cykelsportnord.dk/public_html/app/code/core/Mage/Core/Controller/Varien/Action.php(418): Mage_Cms_IndexController->noRouteAction()
#29 /var/www/cykelsportnord.dk/public_html/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(254): Mage_Core_Controller_Varien_Action->dispatch('noRoute')
#30 /var/www/cykelsportnord.dk/public_html/app/code/core/Mage/Core/Controller/Varien/Front.php(172): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#31 /var/www/cykelsportnord.dk/public_html/app/code/core/Mage/Core/Model/App.php(365): Mage_Core_Controller_Varien_Front->dispatch()
#32 /var/www/cykelsportnord.dk/public_html/app/Mage.php(684): Mage_Core_Model_App->run(Array)
#33 /var/www/cykelsportnord.dk/public_html/index.php(86): Mage::run('', 'store')
#34 {main}