IT seems all of a sudden IE7 will not let me use tinyMCE in 1.6.0
It was working fine earlier and with no changes to plugins or files it stopped working.

I am getting the error when I go to publish or edit.

line 2
Char: 82821
Error: Access is denied
Code: 0
URL http://www.mydomain.com/admin/index.php?S=0&C=publish&M=entry_form&weblog_id=15

So all text areas in my publish/edit do not have tinyMCE, just source code? 

It is working totally fine on Firefox.

TIA
Peter

Just a thought.  Have you tried clearing your IE browser cache? 

Maybe there’s something half-received in there.

I solved it.  it was important not to use www just http://domain.