Visual C++ 2008 - Additional Include Directories dialog is empty

I am having a very weird problem with Visual C++ 2008, on certain projects I cannot properly open the "Additional Include Directories" dialog box anymore. I get the following window instead, which is missing the list itself, and where the "macros" bu开发者_如何转开发tton doesn't work. No matter what the "Additional Include Directories" field contains, even if it is empty, I always get this.

Have you already encountered the issue? Any idea how I could fix this?