Facebook has increased the number of tab applications that are visible above the fold in the navigation menu of Facebook Pages. It also now only allows Pages with more tabs installed than fit above the fold to reorder their tabs.

The changes will allow Pages to expose users to more tabs for promotions, email signups, games, and other functions. However, it will also require some Pages to add multiple apps it doesn’t need to be able to reorder the tabs it wants, increasing friction in the Page management process.

Facebook began the rollout of a major redesign of Pages in mid-February. This moved tab applications from a horizontal bar above the Page’s wall to a vertically stacked navigation menu beneath the profile picture.

The redesign made tab applications slightly less prominent, but provided more space for longer titles and potentially more tabs above the fold. Facebook only allowed six tabs above the fold, though — the same number as before. Read more at www.insidefacebook.com

Facebook may be preparing to launch a new version of its Social Commenting plugin. Judging by the version currently implemented on Facebook’s own blog, it may surface high quality comments or help users identify trolls and spammers by assigning users an aggregated credibility score. Since this score travels with users wherever the plugin is integrated, it should encourage more civil, thoughtful commenting.

The aggregated credibility score is shown as a percentage and a total number of comments in the hovercard that appears when a user is moused over in the Social Commenting plugin. Through extensive testing, we’ve determined that the percentage is calculated using the formula (total Likes – total instances marked as unhelpful or spam) / total Likes. For instance, a commenter who has had their comments Liked seven times and been marked as unhelpful once would have the equation (7 – 1) /7, which equates to 85%. Scores are rounded down and are higher than the equation specifies when there are less than five Likes.

Users and admins will be able to look at this credibility score and deduce whether a certain comment is from a reputable source. Trolls and spammers will accrue a low score or have a low number of total comments, indicating their comments aren’t worth replying to, and their links shouldn’t be clicked. High quality users will build a high score and large number of comments over time. Read more at www.insidefacebook.com