I'm experiencing this now too, I have 2 componentart multipages (one for view, one for edit) that have tabbed multipages on them for different messages (text, html, sms). The editors are on the html pages of the nested multipages. I get the page displayed right away, but then suffer lots of working cursors as some script is being run. I don't have that issue if both cute editors aren't in play...
I have an example file I can send with straight up asp and cuteeditor controls only. In IE, you don't see any issue when switching between multiviews, in firefox 3 you can see the hourglass and a slight delay in rendering. Let me know who to send the code to.
Thanks!