If you are using URL rewriting you might know that you have to take care about the way you reference resources has written in the Scott Guthrie post; Tip/Trick: Url Rewriting with ASP.NET:
Handling CSS and Image Reference Correctly
I am currently working on the new Tech Head Brothers authoring tool THBAuthoring as you can read in this post 'Migration from WSE 3 to WCF'. Two days ago I went to production with the migration from WSE to WCF. Today I had to post an article about Linq written by Kader Yildirim and was quite optimistic that it will work because I followed as always the process of developing on my notebook, then deploying to staging, testing of staging and finally going to production. This time it didn't work. I had a the following error:
"This collection already contains an address with scheme http. there can be at most one address per scheme in this collection."