This will stop the mouse pointer from sticking at the monitor edges, when moving slowly between two monitors. This seems to be happening on Windows 8.1 Update 1, and Windows Technical Preview.
Run regedit
Navigate to HKEY_CURRENT_USER\Control Panel\Desktop
Look for the value MouseMonitorEscapeSpeed
If it doesn't exsist, create a new DWORD value for it
Set the value to 1
Now go to HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\ImmersiveShell
Create a new Key called EdgeUI
Create a new DWORD called MouseMonitorEscapeSpeed and set the value to 1
Now restart your computer.
This is a per-user setting, so if there are multiple users on a computer, you will need to edit this setting for every user.
