Kind of talking to myself here, but in case this will help someone else out. There is an issue with IE and client side caching, it can be overcome!
In my case I was doing a query to fill a datagrid. So in this case I needed add setting to the querytask:
"queryTask.disableClientCaching = true;"
The same setting is available to the featurelayer, if that is something you need to be refreshed in IE:
"editFeatureLayer.disableClientCaching = true;"
Hope this helps someone!