Automatically run cron on change

That is actually an interesting idea. It is not possible now, but we should consider it for later...

Wouldn't it actually be more useful to have a link somewhere to run the internal cron function of scheduler manually? I guess you just want cron to run more often. It is probably not very useful to have cron run right after saving a node since the scheduled time will usually be much later, otherwise you would not need to schedule. If you just want it to run for other nodes, you can either use a module like poormanscron or use a link to run it manually.

I suppose it would be really easy to have a "run schedulers cron function"-link somewhere in the config section.

Correct me please if my assumptions are wrong and provide a use case.

I placed a link for a manual run of schedulers cron function in schedulers settings page (admin/settings/scheduler). Invoking it will run the schedulers internal cron function and return to the settings page.

If you still need something else reactivate/reopen this issue and please provide a use case.

A patch is attached (already commited: http://drupal.org/cvs?commit=455164)