Microsoft Fakes Crashes On Build

Microsoft Fakes Crashes On Build

I'm trying to add Stubs using Microsoft Fakes to an internal project.
Every time I build, I get a popup saying fakes.x86.exe has stopped
working. When I tell it to "debug the project", it shows me that it's
hanging on a call to StringHelper.ToHexString.
I've tried searching Microsoft.com, but all I found was a year-old thread
where someone else had the same issue.
I've got VS 2012 update 2, but I'm upgrading to update 3 at the moment to
see if that makes a difference.