Visitors of my website complained that when they click on a page they often do not see the but only a white page with a smiley. They must refresh and then the page will be shown. The problems seems to appear more often on Firefox browsers.. After some testing I found that disabling the jetpack plugin was the solution. But I really would like to use this plugin, so do other people have this and maybe found a solution.
I think it has to do with the following url :
img id="wpstats" src="http://stats.wordpress.com/