Additional Tags plugin and Accuweather embed

Hi guys,
I'm using the additional tags plugin and it's working fine for embedding YouTube. However, when I add an Accuweather embed code to the HTML the initial DIVs seem to be stripped off i.e. the DIV with the styling information. Basically, the widget appears without the styling info so looks a bit rough.

Here's the bit that's stripped off and replaced with just open/close divs...


<div style='width: 435px; height: 90px; background-image: url( http://vortex.accuweather.com/adcbin/netweather_v2/backgrounds/spring2_435x90_bg.jpg ); background-repeat: no-repeat; background-color: #607041;' >

I tried it with the Default theme to make sure it isn't just a problem with my theme and sure enough the same thing happens. Any advice on how to fix this?

thanks,
Fiona