GET http://now.eloqua.com/visitor/v200/svrGP.aspx?pps=3&siteid=2554&ref2=http%3A//mp.liferay.com/c/portal/logout&tzo=-60&ms=16 elqImg.js:10
(anonymous function) elqImg.js:10
Port error: Could not establish connection. Receiving end does not exist. miscellaneous_bindings:232
Seems that it is eloqua.com's script that fails on Safari and Chrome, however, it seems to work on Firefox and IE8.