I found the problem with navbar executing the regular vb search with blank results.
The extra template code for this got inserted ABOVE the ending form tag from the vbsearch. Move the ending form tag to just after the TR tag of the vb search code.
Code:
<div><input type="text" class="bginput" name="query" size="25" tabindex="1001" /><input type="submit" class="button" value="$vbphrase[go]" tabindex="1004" /></div>
</td>
</tr></form>
<tr>
This way you don't have to revert your template.