On my site, whenever I visit the Blocks page it stalls in IE, and eventually comes back with the error
"Stop running this script?
A script on this page is causing Internet Explorer to run slowly.
If it continues to run, your computer might become
unresponsive"

If I click 'Yes' to this, it asks if I want to debug this webpage. If I say yes to that, I get an error in tabledrag.js, link 106 character 7, saying that "Object doesn't support this property or method".

Any clues as to where/how I can isolate the cause of this problem? It only happens on the admin/build/block/list page, and doesn't appear to happen in FF.

Regards,

Pete.