I got an invalid memory write when I went into Preferences and checked Masked Pixels and then Apply.
I saved a minidump w/ Stack, and the file is 412 megabytes. If I send that to you then you can view the crash in the Windows debugger (I suppose you are using Visual Studio 2010).

For completeness, note that I'm using RawDigger.exe 1.1.1.382, signed on October 13, size 1,670,936 bytes.