I was actually coming here to post the same suggestion. I’m trying to debug something else, and am overwhelmed with log spam from this.
Here are a few other replacements I found in addition to Carsten Bach’s, separated by file in numerical Line order.
social_sharing_toolkit.php
Line 336, replace with:
if ( isset( $this->options['mr_social_sharing_bitly']['enable'] ) && $this->options['mr_social_sharing_bitly']['enable'] == 1) { echo ' checked="checked"';}
Line 353:
if ( isset( $this->options['mr_social_sharing_opengraph']['enable'] ) && $this->options['mr_social_sharing_opengraph']['enable'] == 1) { echo ' checked="checked"';}
Line 395:
if ( isset( $this->options['mr_social_sharing_'.$button_type.'buttons'][$button]['enable'] ) && $this->options['mr_social_sharing_'.$button_type.'buttons'][$button]['enable'] == 1) { echo ' checked="checked"';}
Line 642:
if ( isset( $this->options['mr_social_sharing_'.$type.'buttons'][$button]['enable'] ) && $this->options['mr_social_sharing_'.$type.'buttons'][$button]['enable'] == 1) {
Line 660:
if ( isset( $this->options['mr_social_sharing_follow_buttons'][$button]['enable'] ) && $this->options['mr_social_sharing_follow_buttons'][$button]['enable'] == 1) {
Line 701, replace with:
if ( isset( $this->options['mr_social_sharing_opengraph']['enable'] ) && $this->options['mr_social_sharing_opengraph']['enable'] == 1) {
includes/share.widget.php
Line 16:
if ( ( isset( $this->options['mr_social_sharing_pinterest']['default_image'] ) && $this->options['mr_social_sharing_pinterest']['default_image'] != '' ) && ( isset( $this->options['mr_social_sharing_pinterest']['fixed_image'] ) && $this->options['mr_social_sharing_pinterest']['fixed_image'] == 1) ) {
These are just the ones that I encountered on my site. There may be more unaccounted for in functions that weren’t being used at the time.