I had a certificate expire today and needed to get one reissued from GoDaddy. In the past, I've had no trouble using the pem encodings they generate with the ELB SSL interface. However, when I try to include the SHA-2 bundle (the pem encoded list of certificates in the cert chain) in the certificate chain text area, I get a "Invalid Public Key Certificate" error. If I don't include the certificate chain, I'm able to configure the certificate (however it doesn't validate on iOS and Android).
When I did this a year ago I had no trouble. Also, I should note that this bundle file works just fine with two Apache servers that are not behind load balancers.