The error was because I've moved from memcache to memcached for the php session handler. The syntax is different for how you specify the location
Errors
2012-08-13 16:43:20 - PHP Warning: Unknown: Failed to write session data (memcached). Please verify that the current setting of session.save_path is correct (tcp://127.0.0.1:11211) in Unknown on line 0
2012-08-13 16:43:20 - PHP Warning: Unknown: Failed to write session data (memcached). Please verify that the current setting of session.save_path is correct (tcp://127.0.0.1:11211) in Unknown on line 0
2012-08-13 16:43:24 - PHP Warning: Unknown: Failed to write session data (memcached). Please verify that the current setting of session.save_path is correct (tcp://127.0.0.1:11211) in Unknown on line 0
2012-08-13 16:43:25 - PHP Warning: Unknown: Failed to write session data (memcached). Please verify that the current setting of session.save_path is correct (tcp://127.0.0.1:11211) in Unknown on line 0
Before:
session.save_path ="tcp://127.0.0.1:11211"
After:
session.save_path = "127.0.0.1:11211"