Sure it is fine, but only if you inform the user about that before he buys your stuff. And this should also come with the responsibility to the developer to fix the bugs that occour.
The point is, we are all unprofessional indie developers. All of us. If you read this and consider yourself to be a pro, give your license back. Because frankly, you are not. That may sound harsh, but as long as you are not working on a multi million dollar project for a big budget market, you are not a pro. And that is okay.
In this point I really disagree with spike, from where ever it was quoted. In my opinion, people like wolfire games, frictional games, dejobaan games and some others are professionals, even though their budget and manpower was and still is for sure quite restricted. What makes them professional for me is that they manage to create fun and successfull games and making a living out of it.
