I was curious about this, I switched to FTM Mac a few months ago but still own FTM2012 so I installed it on my Windows 7 laptop, searched a few public trees & public member photos & stories in Web Search and was not able to reproduce the error. There must be some specific combination of software versions and/or configs that cause this since multiple people are reporting it.
For my system (not getting the error) I have:
-Windows 7 Professional SP1 64-bit (If you're not sure what you have, in FTM click Help > About Family Tree Maker > System Information)
-Internet Explorer 10.0.9200.16521
-FTM version 18.104.22.1683
Since this error is definitely coming from Internet Explorer (which is running within FTM), here are some of my Internet Options settings:
-Security tab: Medium-High, Enable Protected Mode is checked
-Privacy tab: Medium, pop-up blocker is on
-Advanced tab: Tried on/off for "Disable Script Debugging" and "Display a notification about every script error", have not been able to duplicate the error
Since I can't reproduce the error I'm kind of stuck as to how to solve it :) but here's something else to try:
1. Close all programs
2. Start > Control Panel > Network and Internet > Internet Options (*or Start > Control Panel > Internet Options depending on your config)
3. Advanced tab
4. [Reset] button
5. Check "Delete personal settings", then [Reset]
This cleans out a bunch of stuff, maybe it'll help???