I should have mentioned I have wp_debug set to true on this site while I'm working...
As far as the sharing buttons, they are set (in settings) to show only on Posts and a custom post type of Projects that I have... I'm not trying to add them here (on the author archive pages) at all, and they aren't showing on these pages when there are posts to show, but the error doesn't show up if the author being viewed has posts.
While I don't believe it makes any difference, you might notice that I have the author page permalinks rewritten to /hacker/ rather than /author/.
Here is a screenshot of the Sharing settings for "Show button on":
This is the page showing the error:
The same error in the Debug Bar plugin:
I noticed a warning popping up on this page too (again only for authors without any posts) related to the Gravatar module of Jetpack:
wp-content/plugins/jetpack/modules/gravatar-hovercards.php:144 - get_userdatabylogin is deprecated since version 3.3! Use get_user_by('login') instead.
Here is a screenshot of that error in the Debug Bar:
That one of course could be fixed by using get_user_by( 'slug', $author ), assuming that doesn't break something else! I've made the update to my install on 3.5.1 ;)
NOTE: Since I have made updates to the Jetpack code on my install these errors will not show if you try to browse it right now.
Other potentially helpful information:
- Active theme: Headway Child (my custom child theme of Headway).
- Active plugins: Jetpack, WordPress SEO, BackupBuddy, Custom Post Type Archive Menu (modified), Debug Bar, Google Analytics for WordPress, Permalink Editor, Recent Custom Posts, ShortCodes UI, Types - Complete Solution for Custom Fields and Types
, Ultimate TinyMCE, Wordfence Security, WP-Memory-Usage, WP Super Cache (not currently caching), WP Views, and Wufoo Shortcode Plugin.
The only one of those I think could make much difference is the Headway plugin, which is generating the templates (rather than custom coding).
Hope that all helps to reproduce what I'm seeing! I'll be happy to provide more info and debugging as needed.