The Quick Reply contents, if any, should be saved when changing pages within a topic and the editor and saved contents should be restored when displaying the new page. That is, the Quick Reply contents should be associated with the member and topic and remembered when viewing any page (including the first one) within the topic. You could expire the saved text after the session is expired.

This would allow you to remove the somewhat redundant (and confusing to some members) Multi-Quote button and just have a single Quote button associated with Replies.

i'm confused.... so long as you give the auto-save callback enough time to fire this should already be occurring.