[MrEyes]

As long as your header template contains the relevant hook location navbar_search_menu then it should work – if it is not present, it will not work. You could try editing your template and ensuring both are present just in case.
$google_navadsearch
$template_hook[navbar_search_menu]

Checking the template shows this hook, the following is the relevant template snippet:

<tr>
<td class="vbmenu_option"><a href="blog_search.php?do=search">Advanced Search</a></td>
</tr>
$google_navadsearch
$template_hook[navbar_search_menu]
</table>

I have also double checked that the "Plugin/Hook System" is enabled in AdminCP.

For now I have followed your earlier advice and manually added the google search code to the template. So it now works, ish (see * below)

This will display once you add the variable $google_siteadsearch

That works a treat, ish (see * below)

I’ve not tested this with vbadvanced 3.0 or 3.7 (yet) but that is coming up shortly.

Well so far I have managed to get the search module added and it seems to work. There is only one problem though:

* When search results are displayed they show in a thin column on searchresults.php which sometimes seems to be cut off. After running some tests this seems to be how google is displaying the result in the iframe. I have set the "Google Frame Width" in "AdminCP - Options - Help vB Google Search (Adsense)" to 700px. This is getting through to the page output as if I view source I see:

var googleSearchFrameWidth = '700px';

However I still get the thin column and sometimes cut off results. Interestingly if I edit the following line in the google_searchresults template:

<div id="googleSearchUnitIframe"></div>

to

<div id="googleSearchUnitIframe" style="border: 1px solid #FF0000"></div>

The results are rendered with a red border around the iframe div and this border uses the "full screen". So it looks like it is the output from google that is causing the problem. However I am at a loss to explain this or find a solution