Program: 169530
Project: 169530
Buggy source:
@Override public final void renderItem(ItemRenderType type,ItemStack item,Object... data){
  GL11.glPushMatrix();
{
    if (type == ItemRenderType.INVENTORY) {
      GL11.glTranslated(0,0.5,0);
      GL11.glRotated(-12,-1,0,1);
    }
    renderTop();
    Minecraft.getMinecraft().renderEngine.bindTexture(new ResourceLocation(Refs.MODID + "String_Node_Str"));
    GL11.glBegin(GL11.GL_QUADS);
    GL11.glNormal3d(0,-1,0);
    RenderHelper.addVertexWithTexture(0,0,0,0,0);
    RenderHelper.addVertexWithTexture(1,0,0,1,0);
    RenderHelper.addVertexWithTexture(1,0,1,1,1);
    RenderHelper.addVertexWithTexture(0,0,1,0,1);
    GL11.glEnd();
    Minecraft.getMinecraft().renderEngine.bindTexture(new ResourceLocation(Refs.MODID + "String_Node_Str"));
    GL11.glBegin(GL11.GL_QUADS);
    GL11.glNormal3d(1,0,0);
    RenderHelper.addVertexWithTexture(1,0,0,0,0);
    RenderHelper.addVertexWithTexture(1,1D / 8D,0,1,0);
    RenderHelper.addVertexWithTexture(1,1D / 8D,1,1,1);
    RenderHelper.addVertexWithTexture(1,0,1,0,1);
    GL11.glNormal3d(-1,0,0);
    RenderHelper.addVertexWithTexture(0,0,0,0,0);
    RenderHelper.addVertexWithTexture(0,0,1,0,1);
    RenderHelper.addVertexWithTexture(0,1D / 8D,1,1,1);
    RenderHelper.addVertexWithTexture(0,1D / 8D,0,1,0);
    GL11.glNormal3d(0,0,-1);
    RenderHelper.addVertexWithTexture(0,0,0,0,0);
    RenderHelper.addVertexWithTexture(0,1D / 8D,0,1,0);
    RenderHelper.addVertexWithTexture(1,1D / 8D,0,1,1);
    RenderHelper.addVertexWithTexture(1,0,0,0,1);
    GL11.glNormal3d(0,0,1);
    RenderHelper.addVertexWithTexture(0,0,1,0,0);
    RenderHelper.addVertexWithTexture(1,0,1,0,1);
    RenderHelper.addVertexWithTexture(1,1D / 8D,1,1,1);
    RenderHelper.addVertexWithTexture(0,1D / 8D,1,1,0);
    GL11.glEnd();
  }
  GL11.glPopMatrix();
}

Fixed version (ground truth):
@Override public final void renderItem(ItemRenderType type,ItemStack item,Object... data){
  GL11.glPushMatrix();
{
    if (type == ItemRenderType.INVENTORY) {
      GL11.glTranslated(0,0.5,0);
      GL11.glRotated(-12,-1,0,1);
    }
    GL11.glEnable(GL11.GL_BLEND);
    renderTop();
    Minecraft.getMinecraft().renderEngine.bindTexture(new ResourceLocation(Refs.MODID + "String_Node_Str"));
    GL11.glBegin(GL11.GL_QUADS);
    GL11.glNormal3d(0,-1,0);
    RenderHelper.addVertexWithTexture(0,0,0,0,0);
    RenderHelper.addVertexWithTexture(1,0,0,1,0);
    RenderHelper.addVertexWithTexture(1,0,1,1,1);
    RenderHelper.addVertexWithTexture(0,0,1,0,1);
    GL11.glEnd();
    Minecraft.getMinecraft().renderEngine.bindTexture(new ResourceLocation(Refs.MODID + "String_Node_Str"));
    GL11.glBegin(GL11.GL_QUADS);
    GL11.glNormal3d(1,0,0);
    RenderHelper.addVertexWithTexture(1,0,0,0,0);
    RenderHelper.addVertexWithTexture(1,1D / 8D,0,1,0);
    RenderHelper.addVertexWithTexture(1,1D / 8D,1,1,1);
    RenderHelper.addVertexWithTexture(1,0,1,0,1);
    GL11.glNormal3d(-1,0,0);
    RenderHelper.addVertexWithTexture(0,0,0,0,0);
    RenderHelper.addVertexWithTexture(0,0,1,0,1);
    RenderHelper.addVertexWithTexture(0,1D / 8D,1,1,1);
    RenderHelper.addVertexWithTexture(0,1D / 8D,0,1,0);
    GL11.glNormal3d(0,0,-1);
    RenderHelper.addVertexWithTexture(0,0,0,0,0);
    RenderHelper.addVertexWithTexture(0,1D / 8D,0,1,0);
    RenderHelper.addVertexWithTexture(1,1D / 8D,0,1,1);
    RenderHelper.addVertexWithTexture(1,0,0,0,1);
    GL11.glNormal3d(0,0,1);
    RenderHelper.addVertexWithTexture(0,0,1,0,0);
    RenderHelper.addVertexWithTexture(1,0,1,0,1);
    RenderHelper.addVertexWithTexture(1,1D / 8D,1,1,1);
    RenderHelper.addVertexWithTexture(0,1D / 8D,1,1,0);
    GL11.glEnd();
    GL11.glDisable(GL11.GL_BLEND);
  }
  GL11.glPopMatrix();
}