Old Pages Being Served by WP Super Cache

When we edit a blog posts the old page is being displayed for some users.

For example, the page shown below shows the correct, edited version in firefox, but shows the old page in chrome:

http://facecrooks.com/Internet-Safety-Privacy/Hashtags-Officially-Come-to-Facebook-But-Be-Careful-What-How-You-Use-Them.html

Also, if you use http://pagewash.com – it also shows the old version.

I have deleted the cache, deleted browser cache and activated / deactivated the plugin. None of those actions have worked.

http://wordpress.org/extend/plugins/wp-super-cache/