Strange graphic bug

Video that show how my game works:
main.yutsuku.net/video/#cosmic_break_display_bug
and to clearly your answer: no, that "black bars/lines" are not from my video camera, they're in game with is the cause why I'm posting there.

I searched over forum but I found only that some people have black screen not that strange bars like mine.

Any ideas how to fix this issue?

I can only suppose that there's problem with "layers"

Like the background layer sometimes gets on top while rendering screen but am I not sure.

Tech. Info:
OS: (x64) Windows 8 version 6.2 build 8102.109.amd64fre.winmain_win8m3.110912-1733
Java: 7 Update 1 build 1.7.0_01-b08

@edit
I forgot add that those "bars/lines" can (yes, they SOMETIMES didnt appears in my game) start/end appear in game in every moment; in arena/idle/customizing robot/etc except shop, I didnt have seen those lines in item shop with is strange for me. This bug very irritates me, because sometimes there's no just one bar. it can be almost entire screen filled those "lines".

>Windows 8

Uh, that's your answer.

One question, why are you running Windows 8? It's pretty unstable since it is still in development.

Windows 8, never heard of it.

LXE wrote:

One question, why are you running Windows 8? It's pretty unstable since it is still in development.

Oh, I see... ._.

LXE wrote:

One question, why are you running Windows 8? It's pretty unstable since it is still in development.

Because why not, and I cannot confirm that Windows 8 is "unstable".

Also CB is the only game (in Java) that have this problem, and only when its running on full screen, if I run game in a window mode there's no problem. But that is not the solution I looking for.

@edit

Issue fixed, I forced some settings for cosmic.exe from nVidia CP (model: 9500 GT)

Feature	Setting
Antialiasing - Mode	Override any application setting
Antialiasing - Setting	16x CSAA
Antialiasing - Transparency	Supersampling
Maximum pre-rendered frames	7
Multi-display/mixed-GPU acceleration	Single display performance mode
Texture filtering - Anisotopic sample optimization	On
Vertical sync	Force off