Sorry to hear that. I don't know what happened and how to prevent it in future. :( I hope it's just some temporary bug. However, does it mean you can't visit any site having Disqus? That would be very bad news, since Disqus seems to be increasingly popular. Or maybe it was something with my Tumblr theme regardless of Disqus... I'm puzzled.
Probably a disagreement between LJ, Tumblr, Disqus, Firefox and a recent Windows update. I shan't worry - but I did wonder what it was! Now that I know I don't need to click on it...
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