I am developing a site using pinax. In one of my templates I am trying to open a simple jquery dialog box. However I keep getting the \"Dialog not a function\" javascript er
I tried to duplicate your error both by using the public google versions and by downloading the legacy (1.6) version from the jQuery UI site and manually including the files. Neither caused a problem (http://jsbin.com/uloqi to see it working).
So, that means one of the following might solve your problem:
I don't know what else to tell you since the code you pasted, when paired with the right files, works perfectly.