+1  A: 

I found the error. It's not related to HTTP/HTTPS at all.

This post helped me on track http://forums.asp.net/t/1196710.aspx

Some assemblies in a dependant module didn't get copied to the output folder. My development machine and the test server has these in GAC, so everything works there.

I added these components explicitly, and now everything works.

Thanks for your time

simendsjo  2010-10-29 07:21:05

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