Enrolling in the Anniversaire event on the demo site I get this error:
warning: urlencode() expects parameter 1 to be string, array given in /var/www/drupal.civicrm.org/public/sites/drupal.demo.civicrm.org/modules/civicrm/CRM/Utils/Geocode/Google.php on line 121.
(I thought I had logged this earlier but I can't find it)
I set up pay later and used it when enrolling.
This part may be a separate bug or the cause of the error above:
I used an enrolment profile with an extra field. I chose three of the drop down boxes - individuals / phone / home but left the last one blank. I then enroled in two events using this profile. The phone number in that field now shows up twice on my profile. (from my own site I can say that once you get up to 8 copies of the phone number you start to get bugs viewing the profile)