[jQuery] jquery 1.3 n.queue is not a function?

When I try to use jquery 1.3 on my test site, I get this error:
jQuery.queue is not a function
[Break on this error] var queue = jQuery.queue( this, type, data );
(firebug)
The site is using livequery, form, metadata and validate plugin in,
all upgraded for 1.3 support.
Weird.