Several others have reported this, we havent seen any kind of explanation as to why it changed. 

Someone over in the FB PS group posted this:

"The latest ProSeries update pushed out changes impacting tax calculations for returns with Form 4952. The software had been incorrectly using the Qualified Dividends and Capital Gain Tax Worksheet for returns with Form 4952. They corrected this to use the Schedule D Tax Worksheet - any returns that were waiting to be efiled have likely been changed."