On my Joomla Website, I am using a template which uses the following CSS rule to make the content pane centred:

```
clear:both;
margin:0 auto;
width:920px;

```

This seems to work perfectly well in FF/Chrome, but when loaded in IE, all is glued to the left side of the window. What's the issue with this? margin: 0 auto; seems like a sensible, straight-forward rule. Why does IE not obey?