UPDATE!
The 4.10.2 Hotfix is now live! This Hotfix resolves a few important issues.
Fixed in 4.10.2- CL#2818068
Fixed! UE-23845 Crash when using “Set Key Time” on an animation key in UMG
Fixed! UE-24685 Matinee movie recording is broken in 4.10
Fixed! UE-22573 A REINST error occurs in widgets that reference one another
Fixed! UE-24115 Cannot launch the editor in DebugGame Editor configuration from Xcode
Fixed! UE-24563 Editor should launch launcher silently
Important Note - ‘VisualStudio2015 Update 1’ is not compatible with the UE 4.10.2 release. Please do not update to VisualStudio2015 Update 1 while using UE 4.10.2
edit: after further testing, we are not aware of any issue with VS2015-Update1 and the UE 4.10.2 release
REMEMBER: Please report any new bugs you find to the UE4 Answerhub “Bug Reports” section