CRM 4.0 Locking up IE 7

Here is a crazy issue we ran across last week. We’ve had this issue with our production CRm where many users have been complaining about IE7 locking up when they went to save a record (Opportunities, leads etc). All of the entities had custom javascript that would make async calls back to the CRM web service on the onload event. When we removed the script IE stopped crashing. So after hours of re-writing all the javascript, they still continued to crash the browser when enabled.

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