I know that dealing with bugs in a development environment can be frustrating. However, say what you will about NI's responsiveness to bugs (and goodness knows from time to time I have), the fact of the matter is that V6.02 and V6.1 are both very stable.
If you want to not get bit by new bugs in V7 one of the easiest ways to avoid problems is not use new features (like the event structure in 6.1) in deliverable code until you've had the opportunity to check it out for yourself. The event structure is a good example for this discussion because the fact of the matter is that it doesn't allow you to do anything new--it just makes it easier to implement certain functionality. In other words, you have a good viable fallback position if the new bell or whistle doesn't work in your application.
In addition, there's no law that says you have to upgrade right away. You can always stick with the old version for a few months to see how V7 works out.
But to address your basic question, NI does release patches or service packs when the situation warrants. Why do you think there's a V6.02? Or the latest version of V5, what is it 5.1.1f or something like that? There isn't a patch out on V6.1 because there aren't any problems significant enough to justify the effort and expense.
Most importantly though, is that if you have to try and explain bugs to customers it means you haven't done your job right. There's an old saying that applies to programming as well as it does to woodworking: "A poor worker blames his tools."
Your task is to create applications that satisfy requirements. If one approach doesn't work, find a workaround. The bottom line is that most customers don't really give a flying fig what their application is written in. They are buying functionality. Yes, it stinks to not have something work, but so what? That (as they say) is life in the big city.
V6.1 isn't perfect, but even with workarounds, the development of a LV application takes significantly less time and is immeasurably less painful than doing the same work in C, BASIC, Pascal, Ada or any other language you can mention.
Finally, I'm not sure what exactly that you are complaining about. Since November of last year, when you joined the group, you have posted exactly **one** question--for which you got answers from a couple different people. If you have problems let us know what they are and we will help. Otherwise don't waste our time dumping on us.
Mike...