I would like to see a Scheduler repair/validation incorporated into CCleaner.
It seems pretty straight forward and a guaranteed hit. The relationship between the filesystem files and registry entries looks simple enough. Most error messages can be corrected by deleting certain easily identifiable registry keys and re-importing the XML file that is usually sitting there uncorrupted. Of course other validation should also be done.
I recently had to educate myself as to how the new scheduler works (Vista, Win7) because I had a problem and the info out there is horrible. Most people just suggest delete files. Hundreds of things seem to corrupt it but there doesn't seem to be a tool to validate/repair it. MS KB articles acknowledge certain updates that corrupt it but the path to recovery is painful and, in my view, unnecessary.