Program: 165612
Project: 165612
Buggy source:
@Override public void render(ScreenTileEntity tileEntity,double x,double y,double z,float partialTicks,int destroyStage,float alpha){
  float xRotation=0.0F, yRotation=0.0F;
  EnumFacing facing=EnumFacing.SOUTH, horizontalFacing=EnumFacing.SOUTH;
  if (tileEntity != null) {
    IBlockState state=Minecraft.getMinecraft().world.getBlockState(tileEntity.getPos());
    if (state.getBlock() instanceof ScreenBlock) {
      facing=state.getValue(BaseBlock.FACING);
      horizontalFacing=state.getValue(ScreenBlock.HORIZONTAL_FACING);
    }
 else {
      return;
    }
  }
  GlStateManager.pushMatrix();
switch (horizontalFacing) {
case NORTH:
    yRotation=-180.0F;
  break;
case WEST:
yRotation=-90.0F;
break;
case EAST:
yRotation=90.0F;
}
switch (facing) {
case DOWN:
xRotation=90.0F;
break;
case UP:
xRotation=-90.0F;
}
GlStateManager.translate((float)x + 0.5F,(float)y + 0.5F,(float)z + 0.5F);
GlStateManager.rotate(yRotation,0.0F,1.0F,0.0F);
GlStateManager.rotate(xRotation,1.0F,0.0F,0.0F);
GlStateManager.translate(0.0F,0.0F,-0.4375F);
if (tileEntity == null) {
GlStateManager.disableLighting();
renderScreenBoard(0,0);
}
 else if (!tileEntity.isTransparent()) {
GlStateManager.disableLighting();
renderScreenBoard(tileEntity.getSize(),tileEntity.getColor());
}
if (tileEntity != null && tileEntity.isRenderable()) {
FontRenderer fontrenderer=this.getFontRenderer();
IClientScreenModule.TransformMode mode=IClientScreenModule.TransformMode.NONE;
GlStateManager.depthMask(false);
GlStateManager.disableLighting();
Map<Integer,IModuleData> screenData=updateScreenData(tileEntity);
List<IClientScreenModule> modules=tileEntity.getClientScreenModules();
if (tileEntity.isShowHelp()) {
modules=ScreenTileEntity.getHelpingScreenModules();
}
renderModules(fontrenderer,tileEntity,mode,modules,screenData,tileEntity.getSize());
}
GlStateManager.enableLighting();
GlStateManager.depthMask(true);
GlStateManager.popMatrix();
}

Fixed version (ground truth):
@Override public void render(ScreenTileEntity tileEntity,double x,double y,double z,float partialTicks,int destroyStage,float alpha){
  float xRotation=0.0F, yRotation=0.0F;
  EnumFacing facing=EnumFacing.SOUTH, horizontalFacing=EnumFacing.SOUTH;
  if (tileEntity != null) {
    IBlockState state=Minecraft.getMinecraft().world.getBlockState(tileEntity.getPos());
    if (state.getBlock() instanceof ScreenBlock) {
      facing=state.getValue(BaseBlock.FACING);
      horizontalFacing=state.getValue(ScreenBlock.HORIZONTAL_FACING);
    }
 else {
      return;
    }
  }
  GlStateManager.pushMatrix();
switch (horizontalFacing) {
case NORTH:
    yRotation=-180.0F;
  break;
case WEST:
yRotation=-90.0F;
break;
case EAST:
yRotation=90.0F;
}
switch (facing) {
case DOWN:
xRotation=90.0F;
break;
case UP:
xRotation=-90.0F;
}
GlStateManager.translate((float)x + 0.5F,(float)y + 0.5F,(float)z + 0.5F);
GlStateManager.rotate(yRotation,0.0F,1.0F,0.0F);
GlStateManager.rotate(xRotation,1.0F,0.0F,0.0F);
GlStateManager.translate(0.0F,0.0F,-0.4375F);
if (tileEntity == null) {
GlStateManager.disableLighting();
renderScreenBoard(0,0);
}
 else if (!tileEntity.isTransparent()) {
GlStateManager.disableLighting();
renderScreenBoard(tileEntity.getSize(),tileEntity.getColor());
}
if (tileEntity != null && tileEntity.isRenderable()) {
FontRenderer fontrenderer=this.getFontRenderer();
IClientScreenModule.TransformMode mode=IClientScreenModule.TransformMode.NONE;
GlStateManager.depthMask(false);
GlStateManager.disableLighting();
Map<Integer,IModuleData> screenData=updateScreenData(tileEntity);
List<IClientScreenModule<?>> modules=tileEntity.getClientScreenModules();
if (tileEntity.isShowHelp()) {
modules=ScreenTileEntity.getHelpingScreenModules();
}
renderModules(fontrenderer,tileEntity,mode,modules,screenData,tileEntity.getSize());
}
GlStateManager.enableLighting();
GlStateManager.depthMask(true);
GlStateManager.popMatrix();
}