Different error message with same code...??

[avoorpool]

Hi Jacques,

Some question for the 'Master".. 

I've added the Forecast Bar onto my Index page, as shown on the SteelSerie Gauges page.
Looks nice.

However, (as usual) I run the W3C validation and guess what??
The SteelSerie Gauges page (gauges-ss.htm) shows NO error but the index page (index.php) with same code, although I deleted the "widt" and "heigt" to eliminate another error, shows 3 errors where I've implemented the <canvas> string (see attachment).

Any idea of why I get this ("id") error and if there's a way to eliminate it??

Thanks,

Arthur