WP reformats your html, even thought it seems like it should just pass the html through. I use wp-unformatted, which prevents any reformatting…
http://ww.wp.xz.cn/extend/plugins/wp-unformatted/
While I’d recommend finding a way around in line styles, you could also try the wp-unformatted plugin. Works well, works with 2.5.
http://ww.wp.xz.cn/extend/plugins/wp-unformatted/
I had the same issue, banged my head against computer then found the wp-unformatted plugin, installed and it works perfectly, and is 2.5 compatible.
http://ww.wp.xz.cn/extend/plugins/wp-unformatted/
