The embedded style they're using for that widget has errors. Some of them are these:
#PDI_container1884988 .pds-box-top {background: url(http://i.polldaddy.com/polls/pdb08-top-right-2.gif) no-repeat right top;padding: 8px;postion: relative;}
#PDI_container1884988 .pds-question {background: #000;border: 2px solid #c20814;-webkit-border-radius: 6px;-moz-border-radius: 6px;border-radius: 6px;postion: relative;}
#PDI_container1884988 .pds-question-outer {postion: relative;}
#PDI_container1884988 .pds-question-inner {postion: relative;}
#PDI_container1884988 .pds-question-top {padding: 8px;font-size: 13px;line-height: 130%;color: #ECBF00;postion: relative;}
There's no "postion" property... And because this property doesn't exist, Fx drops it; hence, the message in the console.
I Don't have time to check what else is messed up, so I'd suggest you contact support and let them know about this. They need to revise their CSS so it wouldn't be a bad idea to point them to this thread.
HTH.