Canvas : stroke draws 2 pixels wide with opacity

[anjanesh]

Has anyone else noticed this ?

https://developer.mozilla.org/en/Canvas ... #section_4
ctx.strokeRect(50,50,50,50); shows an image with the inner most rectangle which is black & 1 pixel in width.

But if you look at the example, https://developer.mozilla.org/samples/c ... _rect.html
it shows the inner most rectangle as 2 pixels wide and lighter than black.
This is happening on all browsers - FF 3.0.10, FF 3.5 beta 4, Safari 4 beta and Chrome 2 beta.

How do I get a pixel wide line ?

Thanks

[zcorpan]

See "Q: Why did you start x and y at 0.5? Why not 0?" in http://diveintohtml5.org/canvas.html