Update #2: Konami reports that all five platforms have now been patched. Unfortunately, server problems still persist.
As of this writing, Xbox One gamers are likely to experience FOB problems and menu sluggishness while connected online. Additionally, Konami has yet to restore full functionality to the FOB mode.
Update #1 (September 17, 2015 at 5:37 p.m.): Konami has updated its post with new information. Metal Gear Solid V: The Phantom Pain on PS3 has now been patched to squash the game-breaking bug.
Original Story (September 14, 2015, at 7:29 a.m.):
After announcing that Metal Gear Solid V: The Phantom Pain shipped with a game-breaking, save-corrupting bug last week, we have good news. Konami has patched the offending problem on two platforms.
Those playing PlayStation 4 and PC are in the clear on this one. The patch is undergoing final testing on Xbox One, Xbox 360, and PlayStation 3 and will likely be available soon.
The error was triggered by bringing Quiet on one of two missions as your buddy. While Konami did put a finer point on it and offer a way to avoid the problem, this patch eradicates it completely.
Unfortunately, Konami continues to have intermittent server problems. The company's website is currently reporting issues with both current-gen platforms.
Online connectivity problems permeate the single-player experience, resulting in sluggish menus. These hangups can leave players stuck on the iDroid screen during a mission, which can impede stealthiness. Taking your game offline immediately remedies the problem.
We'll update when Konami sounds the all-clear on the other three platforms.
[Source: Konami]
Our Take
This was a quick turnaround on the patch, but I'm still surprised that this made it into final retail code. I'm also dismayed at the online issues. While the impact is minimal (and easily fixed) right now if you ignore Konami having to restrict the FOB mode, I have little faith in Metal Gear Online's performance when it arrives.