When you create a texture from a DOM element, for example a canvas, if this element is not attached to the document, the texture will not work.

The reason is texture size is read from the element's offsetWidth/offsetHeight properties, and these properties are always 0 for DOM detached elements; hence texture size will be (0,0).

            boolean isImagePowerOfTwo = Mathematics.isPowerOfTwo( image.getOffsetWidth() ) 
                    && Mathematics.isPowerOfTwo( image.getOffsetHeight() );

(NB: I pasted these few lines of code but same problem in others methods.)

Three.js read width/height properties instead, which is nice because you must fill these properties when you create a canvas to use it as a texture; thus you dont need to attach the canvas to the document.
One possible solution would be to first read width/height properties, then having a fallback on offsetWidth/Height (I can provide a patch if you wish and if you agree on this solution).