I am also having this issue.
I unchecked block offenders, however, I still had to add 'portvar FILE_DATA_PORTS [$HTTP_PORTS,110,143]' in order to get Snort to start.
As said above, the package says its '2.9.1 pkg v. 2.1', but when you install it and open it it says its version '2.9.1 pkg v. 2.0.2'
Looks like there is a few new features though.
Also, WOW, it uses A LOT more memory now. Just throwing that out there.
Guess we'll have to wait until tomorrow.