[jQuery] jquery 1.3.2 error with $(':input[@name=submit]')???

I was using jquery-1.2.6 and now, I started to use jquery-1.3.2, and I
get my first "difference": when I use the wrapped set operation $
(':input[@name=submit]') with jquery-1.3.2 it returns all input
fields, but if I use it with jquery-1.2.6 it returns 0 (as espected).

Is it an error with 1.3.2 version?What do you think I'm doing wrong?
Thank you very much.

P.S.: this wrapped set is used by "jQuery Form Plugin" and, if I have
file uploads I get the alert 'Error: Form elements must not be named
"submit".' from the function "fileUpload" of this plugin.