A customer of mine has two sites in a WordPress network. After updating the plugin to the latest version, it started generating 500 Internal Server errors on pages/post with the social buttons on them. Other pages worked normally.
I deactivated the plugin and now everything works okay. Below some of the errors I noticed in the Apache error log:
[Mon May 13 13:28:51 2013] [warn] [client xx.xx.xx.xx] mod_fcgid: stderr: PHP Warning: Invalid argument supplied for foreach() in /home/xxxx/domains/xxxx.com/public_html/wp-content/plugins/juiz-social-post-sharer/juiz-social-post-sharer.php on line 133 [Mon May 13 13:31:39 2013] [warn] [client xx.xx.xx.xx] (104)Connection reset by peer: mod_fcgid: error reading data from FastCGI server [Mon May 13 13:31:39 2013] [warn] [client xx.xx.xx.xx] (104)Connection reset by peer: mod_fcgid: ap_pass_brigade failed in handle_request_ipc function
(domain info and IP addresses replaced by xxxx)