there is a bug in your script, causing several errors. In my case, the whole site gets white in Internet Explorer, so the content can't be seen.
In googleplusone.php in lines 331, 349, 353, 384 and 401 you're working with the variable $count.
Defining the $count-values as a string, everything is fine.
I would appreciate, if you gonna fix the plugin.
Thanks a lot