How to persist UI state (esp. a splitter's position)?

I need to save the UI state of a jspx page not only during the session but also between logins (i.e. per-user preferences). For certain things, such as tabs' disclosure state, handling it seems obvious: just put in a DisclosureListener to pick up when the client clicks a tab, then tie the Disclosed property to whatever's holding on to that state.
I'm having a bit of trouble getting a splitter panel to send back info when its position changes. I put in a handler for its attributeChangedListener, but no client manipulations have caused it to fire, including moving the position bar and clicking the collapse button. What am I doing wrong?
Additionally, when looking into this issue, I found the Persist and DontPersist attributes on ADF controls. What are these for, and could they be used for my purpose?

Robert,
note that in long term MDS (Meta Data Services) is supposed to provide this customization functionality. As to my knowledge, the splitter panel doesn't provide pesitent customization functionality yet.
Frank

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