In firebug I am getting this...
form has no properties
Anthem_SetHiddenInputValue(null, "__EVENTTARGET", "ctl00$MainContentHolder$VariantsDisplay$modifierTemplate1$ModifierRadioButtonList$1")WebResource.axd (line 257)
Anthem_FireEvent("ctl00$MainContentHolder$VariantsDisplay$modifierTemplate1$ModifierRadioButtonList$1", "", function(), null, true, true)WebResource.axd (line 283)
Anthem_FireCallBackEvent(input#ctl00_MainContentHolder_VariantsDisplay_modifierTemplate1_ModifierRadioButtonList_1 93800b1b-433d-4ba6-a..., click clientX=0, clientY=0, "ctl00$MainContentHolder$VariantsDisplay$modifierTemplate1$ModifierRadioButtonList$1", "", false, "", "", "", true, null, null, null, true, true)WebResource.axd (line 575)
AnthemListControl_OnClick(click clientX=0, clientY=0, false, "", "", true, null, null, null, undefined, undefined)WebResource.axd (line 610)
onclick(click clientX=0, clientY=0)
It appears that the form parameter for a lot of these values is being passed as null. The SetHiddenInputValue is throwing an error when it tries to access this first Parameter. I'm not sure why these are showing up as null though. Let me try and contact Andy Miller (since he is the Anthem guy) and see if he has an idea as to what the error may be before I start trying to chase this one around.