Error: WmfException@/srv/org.wikimedia.civicrm/sites/all/modules/wmf_civicrm/wmf_civicrm.module:1113 (INVALID_MESSAGE Field 'last_name' is too long.
Two donations have caused this:
90550273.1
has a bunch of ideographic spaces (U+3000) that trim wouldn't have caught at the the end.
82169244.1
This one has the last name in Hindi
The character limit for last_name in wmf_civicrm.module that these are getting caught in is 64.