[eluser]Unknown[/eluser]
Hey guy, I got the same error like you and I spend few days look it up in Google, but just like you, no one could solve the problem.
I found your thread here and just want to let you know that this is a issue between CodeIgniter DB_driver and MySQL in Xampp.
I tried to install newer version of xampp (1.8.1) and it worked perfectly.
damned it