Hello,
I believe I am having a similar issue. Screenshot is attached.
The task displays websites in a series as part of the experiment. These script errors happen on maybe 40% of the websites (e.g. in the screenshot the error is happening on the craigslist blog).
I tried disabling script debugging as suggested. This resolves the error when loading the webpage in IE as a standalone application, but not when displaying the webpage as part of a MediaLab experiment.
We are using MediaLab 2012.4.122 with IE 8.0.7601.17514 on Windows 7 Enterprise SP1. I have also tried updating IE to the latest version and the issue persists.
Thanks for your help.
Jason