Unfortunately I still am having issues with this plugin. I do not receive any activities on my blog from Runkeeper. I also have tried importing historic activities from Runkeeper. This fails as seen below:
Fatal error: Call to undefined function date_create_from_format() in /public_html/wp-content/plugins/runkeeper-activity-feed/runkeeper-wordpress-activity-feed.php on line 311
It's as if the function is not recognised (my hosting provider is running PHP 5.2.17) or maybe the time format is wrong? The date format on my site is d/m/Y.
Any suggestions what I can do?