Compatibility issues btwn dwgs created using ACad 2011 & ACad Electrical 2012?

[putitonpaper]

Our EI&C department is looking at moving from ACad 2011 to ACad Electrical 2012 but we want to check to see if there are any known issues with using drawings created with ACad 2011 (other disciplines) and an Electrical department using ACadE 2012; are there any issues re: this?

At present we are currently saving drawings with the 2007 format but are there any issues with any of the file formats btwn ACad & ACadE version numbers other than backwards compatibility?

Is ACadE 2011 no longer available for install or which version seems to be the most stable?

Thanks ! ! !