JQuery - Error with UI and Animations

Question

I get this specific error when working with jquery ui datepicker and have also had the same error when using toggle("slow")

ERROR

jQuery.speed is not a function

Anyone any ideas why this may occur

FF3 / Firebug

Thanks Shaun

Answer 1

Version was OK appeared to be plugin conflict.

Answer 2

I'd check to make sure that the version of jQuery you are including is compatible with the version(s) of the datepicker/jQuery UI you are also using.