The difference in scale between internal QA and any kind of public release can't be overstated. I've played for maybe ~30 hr now, and have yet to encounter most of the worst bugs mentioned in the update. My save files are fine, the game hasn't crashed on me, my crafts haven't randomly exploded, and I haven't had the KSC follow me around either. Which isn't to say I have had a problem-free experience, but it also shouldn't be too surprising that when the game is released to tens or even hundreds of thousands of players, they're gonna notice things that the couple dozen devs and testers may have missed, or underestimated.