I'm sure Brandon will make an official post, but this is on the developer blog: Connect IQ 3.0.1 Now Available.
There is a new eclipse plugin, so be sure to grab that too.
ejdevries. There was a similar thing with mapping on the 1030, where one of the betas supported it, but 3.0.1 didn't. It could be because the FW you mentioned hadn't been released when the SDK was.
You really only need to set it for 3.0.x if you're using any 3.0.x functionality, and you can built for 2.3.x or 2.4.x and it will still run fine on the devices with a 3.x VM. I'm sure the sample you're running will run fine if built for 2.x.x.
Only a couple of my apps in the store were built with 3.0.1 but they all run find on devices with a 3.0.x VM