This webpage has a redirect loop

Hi,
Hoping that i can get help to fix this.

my wordpress site is
http://artcenterofburlington.com/blog/

my new page that I am receiveing “This webpage has a redirect loop” is
http://artcenterofburlington.com/blog/kids-classes-for-fall-2014/

My server is yahoo
I have cleared browser cache

I have saved my permalinks to
post name: http://artcenterofburlington.com/blog/sample-post/

I have no .htaccess files
all plugins are disabled.
WordPress 3.9.1 running Twenty Twelve theme.

Thanks for any info.