A friend of mine, for some strange reason, won't use anything else than Internet Explorer. I was showing him the new site and talked him through the registration in Joomla and then the registration for the LAN event.
When he was presented the payment choices, he clicked the appropriate one, payment in the door, and clicked "Next". He was presented with a popup that said he had to make a selection. He had already done that and tried another choice just for the heck of it. Once again he was given this popup.
I tried in Internet Explorer too, and was presented the same box as him.
I use Safari (I'm a Mac guy anyway..), and I believe it would function the same way in Firefox and Opera too. But Internet Explorer is a no go.
Just wanted to put it out there and see if anyone else has similar experiences.