Non Obvious Details about Content Deployment
When you have Quick Deployment job, and you edit a page and add it to Quick Deployment, the job appears in a list called:
Quick Deploy Items
Go to: http://<mysite>/Quick Deploy Items to view it.
If Quick Deploy is failing, you can go to this list and delete the problem items out.
Also note that your deployment jobs (like your backup jobs) end up in the Timer Job Definitions found in the Operations section of Central Admin. If your Full Deployments are failing, delete them out of the Timer Job Definitions before restarting (the same with failed backups).