I just tried to unsubscribe from a mailing list. How hard can that be, right? Just enter my email address, click submit, and....

"There was a problem"? What the fuck? That has got to be the most useless error message since "Keyboard missing; press F1 to continue." And it's not as if I asked for something complicated. I didn't ask for world peace or a cure for cancer. All I wanted was to never see your crappy newsletters again. How can you possibly screw that up?
And don't you want to at least tell me what the problem was? No? Not even a little hint? Fuck you.