Culture ID 2155 (0x086B) is not a supported culture
I recently came across a VERY annoying problem on my personnal (this one) BlogEngine.Net blog.
What happened is that I installed some Windows Updates (a bunch) on my Windows Server 2003 server and then, every time I accessed an article of this blog I received this error message : Culture ID 2155 (0x086B) is not a supported culture. What a real annoying problem !!
I don't know the exact reason but what I know is that cultures are OS specific, so the Windows Update is the cause... it's not related to the .Net Framework so don't waste your time trying to reinstall the framework, it will not work.
The Solution...
Resintall the Service Pack 2 for your Windows Server 2003.