Text wrapping in IE 7 <li> tags

I have a horizontal menu bar made up of <li> tags, containing links, so a menu item looks something like:

<li>
 <a href="...link...">
  开发者_开发问答<span>Some text</span>
 </a>
</li>

Looks fine, until the menu bar is wider than the screen. When this happens, and the last menu item has one or more words, the second word of this item wraps just underneath the bar. If the screen is made even smaller, then it works fine, as the whole <li> just gets wrapped to the line below.

The <li> tags have a few CSS styles applied to them:

display:block;
padding:5px;
float:left;
list-style-image:none;
list-style-position:outside;
list-style-type:none;

I can get my desired behaviour of the whole <li> wrapping to the line below if I explicitly set a width on the <li> item. However, I don't want to do this, as they are all different sizes by design.

Any ideas?

Add white-space:nowrap;

li > a > span
{
    white-space:nowrap;
}

This should keep item texts on one line.

Use

li span {
    white-space: nowrap;
}

rather than the child selector ( li > a > span ), since the child selector is not supported by all browsers yet.