Civi is behaving oddly in that some CIDs load for viewing normally, but DS agent Bill reported that CID 12919617 is not loading. I'm able to replicate the error. If I go to Find Contacts Advanced Search and paste 12919617 into Contact ID, I do see the summary in the next screen, including the donor's name. When we click on the donor's name link however, we see 'waiting for civicrm.wikimedia.org...'
Bill also reports receiving: "civicrm.wikimedia.org is currently unable to handle this request. HTTP ERROR 500" but I haven't seen that yet.
CIDs 5070569and 92087 are others that behave this way. Can't open change logs for these to look for commonalities.