Crusader Kings II v1.05b Patch Released

Available via in-game autoupdater
Paradox Interactive has issued a new hotfix for Crusader Kings II, fixing a bug with all children getting the exact same education trait. Also, the mouse wheel now works for scrolling in all windows again, and assimilating duchies are now shown clearly on the map in the De Jure Kingdoms map mode (press 'read more' for changelog).
A playable demo can be found here.