Yes...a lot changed.
When the IL software was updated on 29/30 January, the IL software was also updated to include the "correct" 4.3549% blended IL tax rate for 2017. The older data was for the 2016 3.75% rate.
That's just one reason why you couldn't file until the software final 2017 IL forms/rates hit teh software.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*