Earlier this week, the Dynamics AX Sustained Engineering team made available Dynamics AX 2012 Cumulative Update 1 which is available via Partner Source and Customer Source. 

Cumulative Update 1 contains a number of critical fixes and improvements to the overall user experience which have been made based on feedback from customers and partners which are already running their businesses on Microsoft Dynamics AX 2012. For more information on the cumulative update and to download, please refer to KB2579565: Cumulative Update 1 for Microsoft Dynamics AX 2012.