There's absolutely NO reason for this

I've come across this type of message a few times recently, from any number of different web sites. (This one is from a company touting themselves as the "Leader in Media and Marketing Relationship Management") It makes me nuts!!!

Ok, I'm using Safari. Fine. It's version 3, and it's more standards-compliant than that IE atrocity. So, I have no tolerance for your inability to support and test on it. Also, I've got Flash 9.0 r11, so there's no reason to complain about a missing plugin, either. Unless, of course, you're too lazy or not clever enough to write proper detection code.

Get it right, people. No person using the web should be subjected to this.