OK! I was able to reproduce the bug and TristanPorteries reccomended me to fix this. I will see what I can do:)

I guess I should polish this and remove strength variable for filter types that doesn't use it(e.g. Enable/Disable filter).

Maybe you could show me how do I do it? :)

I haven't used glAccum and other things like that. Haven't had experience. That's why I am not really sure how does it act.

Using SoftwareGL didn't make any difference(except so strange FPS system(for some reason works better when there are simple object's in scene, but works worse than my pc when there is this water). However, here is crash report:

Blender 2.73 (sub 0), Commit date: 2015-01-20 18:16, Hash bbf09d9

bpy.ops.object.select_all(action='TOGGLE') # Operator
bpy.ops.object.select_all(action='TOGGLE') # Operator
bpy.ops.object.delete(use_global=False) # Operator
bpy.context.scene.render.engine = 'BLENDER_GAME' # Property
bpy.context.scene.game_settings.show_framerate_profile = True # Property
bpy.context.space_data.viewport_shade = 'MATERIAL' # Property
bpy.context.scene.game_settings.material_mode = 'GLSL' # Property
bpy.context.scene.game_settings.material_mode = 'MULTITEXTURE' # Property
bpy.context.area.type = 'LOGIC_EDITOR' # Property
bpy.ops.logic.sensor_add(type='KEYBOARD') # Operator
bpy.context.object.key = 'NONE' # Property
bpy.context.object.key = 'SPACE' # Property
bpy.ops.logic.actuator_add(type='SCENE') # Operator
bpy.ops.logic.controller_add(object="Plane") # Operator
bpy.context.object.mode = 'CAMERA' # Property
bpy.context.object.mode = 'SET' # Property
bpy.ops.scene.new(type='NEW') # Operator
bpy.context.object.scene = bpy.data.scenes["Scene"] # Property
bpy.context.object.scene = bpy.data.scenes["Scene.001"] # Property
bpy.ops.mesh.primitive_cube_add(radius=1, view_align=False, enter_editmode=False, location=(0, 0, 0), layers=(True, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False)) # Operator
bpy.ops.logic.sensor_add(type='KEYBOARD') # Operator
bpy.context.object.key = 'SPACE' # Property
bpy.ops.logic.actuator_add(type='SCENE') # Operator
bpy.ops.logic.controller_add(object="Cube") # Operator
bpy.context.object.mode = 'CAMERA' # Property
bpy.context.object.mode = 'SET' # Property
bpy.context.object.scene = bpy.data.scenes["Scene"] # Property

When I return from school I will test in a single scene without anything else, just a water...

I think so it won't be good to my GPU(it can burn). Currently I can run my own game in ~400x250 large window at ~10 FPS. It is largest FPS I can get when playing it...:/

No, I can't. I haven't got my own computer so my parents don't allow to install it(as previously it had too much bugs). I will be able to do when I get all information about drivers and when I am sure it is bugless and so I won't have black screen when I install it. I'm sorry. Anyway, in blenderartists.org someone gave me a fixed script(the fix was to end rendering videotexture after leaving scene or something similar...