I have it running fine on 4.2.3 beta 3..

Fair enough, possibly something I've done somewhere but I have no idea what. It would be interesting to know if anyone else with 4.2.3 has a similar problem.

Possibly disable all your other mods and see if the issue is resolved.

Any chance a future update might include displaying it on the forum home page ?

Possibly, but IMO that is just clutter on there, and would not be as easily viewable as it is on the online.php page. Another advantage to it being on the online page, is the page auto refreshes, giving you more up to date numbers. :)

Most VBulletin forums are full of clutter :). The "whats going on" box has number of members, number of guests, most users ever online, etc etc and I though server load and server uptime would be a worthwhile stat inclusion. As a reasonable sized forum (600K posts,60k members), we do regular mailouts that refer members to a particular thread which can send our server load up and down a bit so it would be interesting to both members and staff.

On a seperate note, keep up the good work :)

Now that I think about it more, you should be able to add the following to any template, to get the display.

Indeed you can. Here its displayed on my navbar

Well there you go. :)

Well, this installed fine but shows no stats. Show the text from the mod but all stats are blank.