First, thank you Shamus Turlough. Firefox did work.
Wow, you can purchase SA without a problem using IE, but you can't actually apply the code with IE. Good idea, there. If it isn't lawsuit worthy (they took the money and offered no service), it is at least worthy of getting a "Stupid Site of the Month" award. A site not compatable with the world's most popular browser (regardless of arguments of security) is just plain dumb. Especially when it doesn't even mention anything about needing a specific browser to complete the transaction.
Luckily I have FF installed at work, since occasionally I test our websites with it. I'll never install FF at home. I don't need it. Well, apparently with the exception of this one case.
Not to get too far off topic, but the argument for Firefox's security is like the argument for moving to Siberia to get away from New York City's crime rate. Of course it's more secure. It has no real population, it has no real enemies, and nobody really cares about it.... yet. Firefox did an impressive job of gaining popularity, so now it has the population. Population gives hackers and the such a reason to give it notice. Given a few years, a few of those people will develop a grudge for whatever reason against Mozilla/FireFox/OpenSource/WhateverPerceivedSlight and they'll start attacking FF just as they attacked IE. Only, they get the source code to work with. Oops. Ya, really secure.
So, ya, move to Siberia. It's a really safe place. For now.
Ya, I'm a bit ticked. I purchased SA a week ago and contacted EA Support 3 days ago, just to finally find out from another player that the problem was just shabby work on the part of the web programmer(s).