What version of the GData Client Library are you using? Switching to v3 should just be a matter of using the ContactsClient class, in your case (no download or install). I suggest it because it is actively developed, and may be more immune to the issues you're experiencing. Depending on your app workflow & how much code you already have on top of ContactsService, it might make sense to use ContactsClient only in the case where you would like to update a photo.
As far as the content_type being rejected, I don't have any really smart ideas. Although incorrect, try setting as image/png just to see what happens. I think, if possible, switching to ContactsClient is the way to go from here. -- You received this message because you are subscribed to the Google Groups "Google Contacts, Shared Contacts and User Profiles APIs" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://code.google.com/apis/contacts/community/forum.html
