I found this tale of Opera expanding their server base hilarious. It highlights the one-size-fits-all approach many major vendors have, where they just ship stock along for a quick evaluation without checking how well it fits the customer's needs. In this case, they dismiss the customer's flagship product as a configuration error. Not to spoil the ending too much, but they missed out on millions in revenue...
I guess the big story here is, to sell something to a customer, you should ensure you understand their business enough to ensure your product offering is appealing to them, and not repellent! Regardless of who wrote the offending code, the sales team (and in particular SE if any involved) should be right on top of things like this.