Sorted:

Magento Fatal error: Call to undefined method Mage_Catalog_Helper_Product::initProductLayout()-Collection of common programming errors

problem about where-Collection of common programming errors

problem about varnish-Collection of common programming errors

codeigniter modular seperation problem php mvc-Collection of common programming errors

EAV and DataTypes-Collection of common programming errors

problem about entity-attribute-value-Collection of common programming errors

problem about apc-Record and share programming errors

Action ajax call in Magento response 302 (need admin login)-Collection of common programming errors

javascript,json,node.jsRelated issues-Collection of common programming errors

lion,xcode,error,homebrewRelated issues-Collection of common programming errors