If your product/service is one you host yourself, it is common practice to have a staging environment that replicates the production environment for final certification, etc. One lesson I am in the midst of learning is that you need to do regular audits of your staging and production environments to make sure they are in sync. It is now 2AM and we’ve been hunting down WL -> Oracle issues for an hour. I don’t know the exact cause, but the official developer reason is “a difference between how we are doing things in staging vs production”. Doh. The long night just got longer…