I have an options page setup for a ticker tape on a theme I am working on. It has a number of options such as Title, number of posts to display and what categories to display posts from.
I have also set it up using a transient cache option. Obviously I need to delete the transient key when any of the options are updated. I can set each of the options callback functions to delete the key ok. But what I am wondering can I write a function and add a filter so that when Save Changes is clicked the transient is deleted, so I won't need to code into each of the callback functions to delete the transient key.