Bjorn, I detailed answers to your questions all above. "Where" it happens is at my home page, to start with.
Here are the yellow warning flag codes from the bottom left corner:
Webpage error details
User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; GTB7.5)
Timestamp: Wed, 9 Oct 2013 17:02:12 UTC
Message: Script error
Line: 0
Char: 0
Code: 0
URI: http://geni1-mhcache-com-myheritage.netdna-ssl.com/assets/libs-50f4...
Message: Script error
Line: 0
Char: 0
Code: 0
URI: http://geni3-mhcache-com-myheritage.netdna-ssl.com/assets/applicati...
Message: 'undefined' is null or not an object
Line: 61
Char: 5
Code: 0
URI: http://www.geni.com/home
Message: 'Geni' is null or not an object
Line: 283
Char: 5
Code: 0
URI: http://www.geni.com/home
Message: 'NoticePoller' is undefined
Line: 344
Char: 9
Code: 0
URI: http://www.geni.com/home
Message: 'Geni' is null or not an object
Line: 567
Char: 7
Code: 0
URI: http://www.geni.com/home
Message: 'PeopleTagger' is undefined
Line: 614
Char: 5
Code: 0
URI: http://www.geni.com/home
Message: 'undefined' is null or not an object
Line: 726
Char: 5
Code: 0
URI: http://www.geni.com/home
Message: 'Ajax' is undefined
Line: 1457
Char: 3
Code: 0
URI: http://www.geni.com/home
Message: 'Ajax' is undefined
Line: 1845
Char: 5
Code: 0
URI: http://www.geni.com/home
Message: Object expected
Line: 2016
Char: 3
Code: 0
URI: http://www.geni.com/home
Message: 'Ajax' is undefined
Line: 2020
Char: 3
Code: 0
URI: http://www.geni.com/home
==================
Who knows if the problem is Flash, JavaScript, or whatnotall. But basically everything beyond a simple hyperlink fails.
The recent activity summary never loads. The scrolling bars for dowwnloading stories and downloading revisions never stops.
The problem is a complete failure to load for every single instance of where Geni implements a drop down list, shows scrolling bars, shows the twirly thing (techincal term) in the tree completeness section, shows the relationships details at the top of a profile, opens the lower section of a profile after the standard delay, changes page view on the Timeline tabs etc., shows the gray options select in the edit fields...
And on top of all that a complete failure to open the tree view.
And for what it's worth, as I stated above, these problems only occur to this extent with Geni. Otherwise, I would not be here griping about it incessantly.
But I will try again deleting cookies, et. al, try that utility you posted, been through this, but maybe not thoroughly enough.