Posting this as a bug, because 0.12.6 didn't behave this way...
System Specs:
Intel Core i5 560M
4GB RAM
GeForce 310M
On upgrading from 0.12.6 via the built-in updater or launching from a freshly-downloaded (and extracted

Here is the contents of factorio-current.log just after killing the process:
Code: Select all
0.001 2015-09-15 12:52:33; Factorio 0.12.7 (Build 16743, win64)
0.001 Operating system: Windows 7 Service Pack 1
0.001 Program arguments: "C:\Factorio\bin\x64\Factorio.exe"
0.001 Read data path: C:/Factorio/data
0.001 Write data path: C:/Factorio
0.001 Binaries path: C:/Factorio/bin
Let me know if you guys need any additional info.
Thanks!
-Axemann