X on FreeBSD amd64

I've gotten an amd64 desktop and started running FreeBSD/amd64 on it. I've had an amd64 capable machine before, but chose to run the i386 version of FreeBSD on it so I could use Nvidia drivers and have hardware accelerated graphics. (I think the linux flash player only runs on i386 too, but am not sure.)

So, I installed without issue. I included X in the installation and it worked fine. But, as I often do on new machines, I updated the ports tree and then began to install everything else I wanted and upgrade what I had there already, including X.

Then X wouldn't start correctly anymore. I had run it the first time without creating any config file. But, now it really wasn't happy. It would kind of hang, pointer wouldn't move and even <Ctrl>-<Alt>-<Backspace> wasn't working. (But, the computer wasn't hung. <Ctrl>-<Alt>-<Delete> still worked!) So, I created a config file (using one of those utilities, maybe 'x86config'). Still didn't work right. Then I started the process of changing different, random stuff in the config file to see if it would start working. It wouldn't.

So, I resorted to Go0gle, something I should have done alot sooner. I found this config file out there and it helped solve the problem pretty quickly. These two options in the "Server Layout" section did the trick:

Option "AllowEmptyInput" "false"
Option "AIGLX" "true"

Well, the "...EmptyInput" option rings a bell. :/ I don't really know much more. Is this a quirk of the amd64 platform? (But, if so, why did the release packages work without a config file?) Is this a quirk of the newer version of X?

Answers are hard to find when it comes to X. Be happy with a working config file.