multi-edit failure in FF3 on Win XP+issues

Theresa Willams can't edit templated cards-- she's running Firefox 3.07 on Win XP.  I had her install firebug, when clicking save on multi-edit she gets this error :

this.form is null
onclick(click clientX=64, clientY=246)

the card was http://wagn.catcomm.org/wagn/Omidyar_Network