as the title suggests - I spend hours on this one trying to work out what I was doing wrong - turns out as soon as I disabled the URL provider the Google Plus 1 button seems to work. When enabled I get an error when trying to plus one, it goes red with a !. Chrome gives me the following error when I check the console errors:
Unsafe JavaScript attempt to access frame with URL
http://www.gentex.com.au/info-cente...or-the-web" target="_blank" rel="nofollow">http://www.gentex.com.au/info-cente...or-the-web from frame with URL https://plusone.google.com/_/+1/confirm?hl=en-US&url=http%3A%2F%2Fwww.gentex.com.au%2Finfo-center%2Fblog%2Fgentexs-web-blog%2Fcross-browser-custom-fonts-for-the-web&t=1316945326799&referer=http%3A%2F%2Fwww.gentex.com.au%2Finfo-center%2Fblog%2Fgentexs-web-blog%2Fcross-browser-custom-fonts-for-the-web&jsh=r%3Bgc%2F23980661-3686120e#id=I3_1316945330432&parent=http%3A%2F%2Fwww.gentex.com.au&rpctoken=322672764&_methods=mouseEvent%2C_onopen%2C_ready%2C_onclose%2C_close%2C_open%2C_resizeMe. Domains, protocols and ports must match.
Here is the URL you can try it on to see for yourself.
http://www.gentex.com.au/info-cente...or-the-web" target="_blank" rel="nofollow">http://www.gentex.com.au/info-cente...or-the-web
How can we fix this?