Recently I got couple emails/comments about PHP problems. First of all, I do test this plugin in two different server configuration which has different versions of PHP. I think if there is no special configuration of PHP, you won't get any problems. If you have some issues, it's most probably hosting company related configuration problems.
Anyway, in any case I did update my code to give more support to early releases of PHP like 5.0, 5.0.x etc..
However, I'm not a PHP guru or expert. If there is any suggestion about my code, I'm absolutely open to hear about it.
I've just released 2.7.1 and I hope it resolves some issues for those guys.