I have had some trouble preventing IE, particular IE 7 to stop caching pages. I read quite a number of articles relating to people's experiences and how they fixed it but it was hard to find one that worked for me. Eventually I had to use the following fix:
<META HTTP-EQUIV="Pragma" CONTENT="no-cache">
<META HTTP-EQUIV="Expires" CONTENT="-1">
based on the information available on following url: http://support.microsoft.com/kb/234067
Would to God that we'd all quit IE for good. Hope this saves someone some agony over IE.