What? add_action does nothing but call add_filter and nothing else? There is no difference in functionality, it’s only a different name. So there is no reason why you shouldn’t use add_filter instead of add_action if you have no other solution.
I don’t say that you should interchange filter and action hooks at will. Using the correct hook type makes your code more readable and maintainable, for yourself and for others. Nevertheless, if there’s not other way to accomplish your goal but to use a filter hook instead of an action, don’t hesitate, it virtually makes no difference.
On March, 11th an update of the popular plugin “WordPress SEO” was published because the previous version contains serious security vulnerabilities (CSRF and blind SQL injection). During the day some people noted that Yoast didn’t use all possible channels to call attention to the situation.
Though pagebar is quite customizable you can’t define the overall look. “Previous page” is always on the most left, followed by “First” and so on but maybe you want the elements in a different order. I’m not aware that any of the paging plugins provide this feature, pagebar hopefully will do so in the next major version. Continue reading New ideas for pagebar v3 – Part 2: Customization by Drag’n Drop