This is an odd issue, which I thought I should bring to the attention of the Dell team somehow.
I installed the A03 bios for my XPS 13 a few days ago, when it was pushed out to my laptop. Immediately, I started to get the 'repeating keypresses' issue that a few people have reported. Button presses, especially to the spacebar, started to appear twice when the button was only pressed once. This was an intermittent issue - I'd roughly estimate it was one keypress in ten, if not less.
Surprised, I rolled back the bios to A02, then to A01, then to A00. Only on rolling back to A00 did the problem resolve itself. I'm currently running the A00 bios and the problem is gone. Which is fine, as I didn't have any complaints to begin with, but it's rather odd that a bios update breaks things rather than fixing them.
I'm aware this is probably not a widespread issue (otherwise I would have read more complaints about it) but I thought the team should be aware.
Many thanks.