I get that you didn't intend it as an insult, and you probably didn't have people like me in mind when you made that comment. However, the relatively recent "PHP programmers are stupid" thing has so turned me off to any kind of programming discussion that I now habitually avoid any discussion of programming at all -- for the first time in all my years as a programmer.
It doesn't matter if there's 10 or 10 million PHP developers, it's still insulting. You sell a product online, and you've now alienated a large developer community. I'll never recommend or sign up for tarsnap now.
It wasn't a better solution. It was one of many alternatives which came to mind; but I offered them the best solution (serve the graphs from a PHP script) and the easiest solution (run a cron job to delete the old graphs).
The implication in your word choice came across as unfair and elitist.
> EDIT: To elaborate: I'm definitely not saying that all PHP developers are idiots. But PHP is a much easier language to learn than many others, so it gains a lot of users at the low end of the ability spectrum. There are just as many talented and security-aware Windows users as there are talented and security-aware Debian users, but there are far more untalented and security-unaware Windows users.
Okay, that's a fair statement. I thought you were calling ME an idiot :P