AlexGuestbook isn't, at this time, fully compatible with PHP 5.4 et 5.5. If your host uses these newer PHP versions, errors and warnings might be visibly posted on top of your guestbook page

Our friend Otomatic likes to install the latest PHP versions. He found new errors......and he shares his experiences and solutions on this forum. Thank to him !

A future AGB version will correct these errors but isn't clearly scheduled at this time. So, in the meantime, please follow Otomatic's instructions on how to install AlexGuestbook on new PHP configurations without getting the warnings :
If you get this kind of warnings :
Strict Standards: Only variables should be passed by reference in ...
See viewtopic.php?f=6&t=2826
And/or if you get this kind of warnings :
Strict Standards: Resource ID#21 used as offset, casting to integer (21) in ...
See viewtopic.php?f=2&t=2822&p=15224#p14449
In admin panel you can't edit some posts :
See viewtopic.php?f=2&t=3046#p15302