I love my XPS 15 otherwise, but it has the same problem: A double-pressing spacebar all the damn time, and capslock+<key> (I remapped caps to ctrl) leaves <key> software-stuck until I press any other key.

So far, no updates. I could send it to Dell to have the keyboard replace, but that's going to leave me without a laptop for days, and will do exactly nothing, since this is a software problem.