I am also seeing this same error. I believe it is related to either a pop up window or a banner ad within the Xolox window itself. Either way, this is new behavior even though I have had a clean install of versions 1.21 since its release and I have not changed anything about my configuration. As such, I suspect that this is some code in the HTML of the banners and/or popups that is trying to execute on my PC and is being prevented by the security settings within IE itself. Sounds malicious since IE's security is extremely weak. I am beginning to become distrustful of Xolox. The popups have increased to an annoying level. I also suspect the porn bombs and false downloads may be linked to Xolox since some of the sites they redirect you to are hosted by level3.net which apparently hosts Xolox.