A lot of people are busy arguing who to blame, I just think it's interesting that sometimes you need to support non-standard software. Actually, I think it's in

A lot of people are busy arguing who to blame, I just think it's interesting that sometimes you need to support non-standard software. Actually, I think it's interesting that highly successful programs are not the ones who go "not my fault, you should just implement the spec better". Raymond Chen talked[1] about the importance of supporting that ran on Win95 but broke on WinXP, even if they weren't complying to Microsoft specs. I also remember reading that web browsers had to go to great length to render completely non-compliant web pages. In your experience, when should you decide to support "non-complying" behavior? [1]: Unfortunately I cannot find the original article by Chen but I could find extensive mentions of it in [this article by Joel Spolsky](http://www.joelonsoftware.com/articles/APIWar.html http://www.joelonsoftware.com/articles/APIWar.html)