Updated version 1.4.x to 1.9.x. Yes community edition.

Followed steps as mentioned at http://sitestree.com/some-magento-stuff-worked-on-today/

Used key: http://connect20.magentocommerce.com/community/Mage_All_Latest, the other one did not work

Faced issues such as:

1. invalid package or package already exist for some packages

Solution:

Changed code in one of the files that check for existence of packages, if so returns false (does not…