I have some websites that are in joomla version 1.0, may have some security and functionality problems. I want to migrate them to version 1.5. What are some important issues that i need concern, pls help!
Here are some links may help you:
http://docs.joomla.org/Migrating_from_1.0.x_to_1.5_Stable
You can migrage whole content of website, but the templates and components etc may need to be re-installed since they may not compatible with new version of joomla.