Giving out the wrong page for several hours is obviously better than giving out the wrong page forever, but it's still broken. Better would be to re-request th

Giving out the wrong page for several hours is obviously better than giving out the wrong page forever, but it's still broken. Better would be to re-request the page after several hours and compare it to the cached copy. Then if they're different, update the cache, but also generate an alert to notify the administrator that something "impossible" happened and there is a bug somewhere that needs to be fixed.