官方说是安全性上的update，看来wordpress最近修补的还是蛮勤快的。

Open the wp-includes/template-functions-category.php file in a text editor like Wordpad.
Go to around line 103 where it says get_the_category_by_ID.
Create a new line after that and paste in $cat_ID = (int) $cat_ID;

简单的升级方法是：直接上传wp-includes中的template-functions-category.php和version.php