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Using the align attribute is deprecated and will cause severe rendering errors if you are not careful and doesn't take the usage of the align attribute into account when you create the rest of the html.
For instance in newbb2 the front page is rendered using div and span tags, and not table tags as you might expect. This is all fine and well, as long as the rest of your code is well behaved. However if you use an image tag with the align attribute in it (align="left" for instance), the image will cause text to wrap around it, and it doesn't stop when the current article ends, it will wrap proceding articles as well, which causes the rendering to be completely screwed up, in ALL browsers, including IE.
I think the align attribute should not be used, and we will have to live with some alignment issues until a solution can be found using css.