Label does not show when theme="ajax"

I have an autocompleter whose label does not show. As a result, I have to take the HTML that I expected to be generated and manually add it to my .jsp. This may be the desired behavior in which case feel free to close the bug. I know it does not happen when I leave out the theme="ajax", but then the autocompleter does not work.

<tr>
<td class="tdLabel">
<label for="AddSystem_department" class="label">
Department
<span class="required">*</span>:
</label>
</td>
<td>
<s:autocompleter label="Department" forceValidOption="true"
name="department" required="true" theme="ajax" href="%

"
loadOnTextChange="true" showDownArrow="false"
searchType="substring" />
</td>
</tr>