Really Obscure, when I use babelfish I can open the thread (although it looks strange translated), but I still can not open it the normal way.
Linear and Hybrid mode working like a charm here.I found the reason for this! If I set the Thread Display to "Hybrid" I can not open the thread. If I go to linear it works!
So it seems to be an issue with the Hybrid (just tested: Threaded Mode does not work 100% also, it gives me some error messages and then shows the text but the box with the thread overview is empty).
[EDIT] Quick addition, threaded mode gives me the error messages (Expected ";", then "Line 130, 'cursorpostid' is undefined).