I couldnt stop laughing at this article, where HP's new face tracking software for it's webcams doesn't detect black faces.

http://www.stuff.co.nz/technology/gadgets/3187319/Is-this-computer-racist

HP have acknowledged the defect and are looking to fix the issue.

Perhaps they didnt test enough people with different skin pigmentations/colours to ensure the product worked with a reasonable amount of success :D