When I was first getting started, it was common for new users to find little bugs here and there. I'd generally be able to fix them within minutes of the customer contacting me, and that really impressed them. The customers who found bugs were actually happier than the ones that didn't, because the people that didn't find bugs never had an excuse to contact us, so they didn't know we offered great customer service.

I used to joke with my co-founder that we should intentionally add a small bug for all new users so that we could "fix it" immediately after they reported it. We obviously didn't actually do that because it's incredibly shady, but I think it would end up resulting in happier customers in the long run.