Warnings upgrading from Joomla 2.5 to 3.x
From Joomla! Documentation
Revision as of 21:18, 12 August 2013 by Tom Hutchison
When updating from the 2.5 series to the 3 series you may see a large number of warnings and notices on the update page.
What is the cause
What is the fix
These do not interfere with the update process and may simply be ignored.