[Typo3] why Internet Explorer show contents like this?

[Bing Du]

Our typo3 site was just upgraded from 3.8.0beta2 to 3.8.0.  After 
upgrade, IE (I tested 6.0.2900.2180.xpsp_sp2_gdr.050301-1519) shows 
contents like this:

| main menu |         This is the first line.   |
|           |         This is the second line.  |
|           |         This is the third line    |
|           |                                   |

It should be like this:

| main menu | This is the first line.           |
|           | This is the second line.          |
|           | This is the third line.           |
|           |                                   |

The page looks right in Netscape, Firefox, etc.  The page looked right 
in IE before upgrade.

Page source:

<div id="content">
    <p class="bodytext">This is the first line.</p>
    <p class="bodytext">This is the second line.</p>
    <p class="bodytext">This is the third line </p>
</div>

What could cause the problem?

Thanks in advance for any help,

Bing