The question of “which version should I run” has been coming up a lot lately. We suggest people upgrade from 1.0.1 to 1.2b1 on numerous new installations because they run into bugs that have since been fixed. This is a good thing, 1.2b1 is actually the most bug-free release of pfSense ever. But it still does have some issues so it’s not ready for release yet.
For new installations, we recommend 1.2b1 at this time, unless you are using wireless. Some people seem to be seeing some regressions in the wireless in FreeBSD 6.2 that don’t exist in 6.1, which is what the 1.0 series is based on. We haven’t been able to replicate the problems, but several people have had issues.
For now, our recommendation for new installations is the current 1.2 beta release (1.2-BETA1 at the time of this writing), unless you’re using wireless with an internal wireless card then 1.0.1.