Forum Moderators: not2easy
I noticed that IE does not change the text size in this fashion if I set the text-size in css.
If you set the text-size to px in your CSS then IE won't resize it if selecting the option in the browser. Although it should! It is just a fault of the browser that it doesn't.
In short, your design needs to be able to at least cope with different font sizes as there is no gurantee what font-size the user will be seeing.
You could fix the widths of your elements so that your design will always extend downwards. Or specify dimensions (and perhaps font sizes) in em's so that your containers grow/shrink with the font-size.