Amnesia 1.2.1 latest version crashes a lot on modern PC

[prodiJy2000]

Windows 7 Professional 64bit
CPU i7 920 with 6GB RAM
Radeon 5850
Custom Desktop


I bought the game from Humble Bundle version 1.2.1 and played the 1st level with no problem.
Today I played and it crashes constantly after a few minutes of play at different places.
I ran as admin, no difference.

I wished the log file gave an helpful error where the crash occurs.
The forums did not help.

Any help appreciated!


Version 1.20
-------- THE HPL ENGINE LOG ------------
Engine build ID 20101021192547

Creating Engine Modules
--------------------------------------------------------
Creating graphics module
Creating system module
Creating resource module
Creating input module
Creating sound module
Creating physics module
Creating ai module
Creating gui module
Creating generate module
Creating haptic module
Creating scene module
--------------------------------------------------------

Initializing Resources Module
--------------------------------------------------------
Creating loader handlers
Creating resource managers
Adding loaders to handlers
--------------------------------------------------------

Initializing Graphics Module
--------------------------------------------------------
Init lowlevel graphics: 1920x1080 bpp:32 fs:1 ms:0 gpufmt:2 cap:'Amnesia - The Dark Descent - Loading...' pos-1x-1)
Setting video mode: 1920 x 1080 - 32 bpp
Init Glew...OK
Setting up OpenGL
Vendor: ATI Technologies Inc.
Renderer: ATI Radeon HD 5800 Series
Version: 4.2.11733 Compatibility Profile Context
Max texture image units: 16
Max texture coord units: 16
Max user clip planes: 8
Two sided stencil: 1
Vertex Buffer Object: 1
Anisotropic filtering: 1
Max Anisotropic degree: 16
Multisampling: 1
Texture compression: 1
Texture compression S3TC: 1
Auto generate MipMaps: 1
Render to texture: 1
Max draw buffers: 8
Max color render targets: 8
Packed depth-stencil: 1
Texture float: 1
GLSL Version: 4.20
ShaderModel 2: 1
ShaderModel 3: 1
ShaderModel 4: 1
OGL ATIFragmentShader: 1
Setting up G-Bugger: type: 0 texturenum: 3
Adding engine materials
Initializing DevIL
Vendor String: Abysmal Software
Version String: Developer's Image Library (DevIL) 1.6.8pre Aug 12 2006
Version Number: 168
Adding engine post effects
--------------------------------------------------------

Initializing Sound Module
--------------------------------------------------------
Initializing OpenAL
Available OpenAL devices:
0. Generic Software on Speakers (Realtek High Definition Audio)(OpenAL default)
Trying to open device 'Generic Software on Speakers (Realtek High Definition Audio)'... Success!
Number of mono sources: 32
Streaming setup: 4 Buffers x 262144 bytes each
--------------------------------------------------------

Initializing Game Module
--------------------------------------------------------
Adding engine updates
Initializing script functions
--------------------------------------------------------

User Initialization
--------------------------------------------------------
--------------------------------------------------------

Game Running
--------------------------------------------------------
-------- Loading map 'menu_bg.map' ---------
Cache Loading: 892 ms
Entities: 172 ms
Compilation: 0 ms
Total: 1071 ms
Meshes created: 25
Bodies created: 5
-------- Loading complete ---------
Setting profile: 'Phil' Path: 'C:\Users\Philippe\Documents/Amnesia/Main/Phil/'
-------- BEGIN LOAD FROM C:\Users\Philippe\Documents/Amnesia/Main/Phil/AutoSave_Archives_2012_7_28_12_49_52_0.sav ---------
LOADING SAVE GAME!
-------- Loading map '03_archives.map' ---------
Cache Loading: 1871 ms
Entities: 1718 ms
Compilation: 81 ms
Total: 3983 ms
Meshes created: 300
Bodies created: 92
-------- Loading complete ---------
WARNING: Could not find player start node ''
ERROR: StartPos '' does not exist!
-------- END LOAD ---------

[Googolplex]

What the hell is v1.2.1?

Did I miss an update?

[Your Computer]

What the hell is v1.2.1?
Did I miss an update?

The version of Amnesia released during the Humble Bundle was beyond 1.2 (although, the hpl log the topic starter posted shows the same build ID and version as the version of Amnesia that i have, which is 1.2).