Using the FacebookDesktopSample, if you input a valid username and invalid password and click Login, eventually you will get a popup stating 'KEYS' is undefined. Clicking yes, makes it so you eventually get the Facebook invalid username/password screen.
Regardless, that popup shouldn't be occurring. Any idea why this is occurring and what the fix is?
Details of the popup:
Internet explorer script error
error: 'KEYS' is undefined