I’ve got the same problem. It only started after I imported all the posts via WordPress XML from another WordPress blog. I only needed the content so I removed all the pages, categories, etc. then this problem materialized. It happens in FF and IE.
Sometimes I have to hit “continue” 2 or 3 times before it finally makes it thru whatever the problematic script is.
I’ve reloaded all the JS pages as suggested in this thread to no avail. I’m on the verge of just scrapping the site, and starting over. Please help.