I got the same problem attaching to a WorldCommunityGrid project. In order to get around the certificate error, I had to manually drop a downloaded ca-bundle.crt file into /var/lib/boinc-client from this site: http://boinc.berkeley.edu/trac/browser/trunk/boinc/curl/ca-bundle.crt?format=raw
A quick diff shows that the new certificate has these new ones (First line after BEGIN and truncated to 60 characters): MIIC8zCCAlygAwIBAgIBATANBgkqhkiG9w0BAQQFADCBszELMAkGA1UEBhMC MIICETCCAXoCAU4wDQYJKoZIhvcNAQEEBQAwUTELMAkGA1UEBhMCSlAxHzAd MIICIzCCAYwCAU8wDQYJKoZIhvcNAQEEBQAwWjELMAkGA1UEBhMCSlAxHzAd MIICIzCCAZACBQJBAAAWMA0GCSqGSIb3DQEBAgUAMFwxCzAJBgNVBAYTAlVT MIICjjCCAfegAwIBAgIBBjANBgkqhkiG9w0BAQQFADBtMQswCQYDVQQGEwJE MIICkDCCAfkCAgCNMA0GCSqGSIb3DQEBBAUAMIGPMQswCQYDVQQGEwJVUzEn MIICMTCCAZoCBQKmAAABMA0GCSqGSIb3DQEBAgUAMF8xCzAJBgNVBAYTAlVT MIICUDCCAbkCAgGbMA0GCSqGSIb3DQEBBAUAMHAxCzAJBgNVBAYTAlVTMRgw MIICUDCCAbkCAgGXMA0GCSqGSIb3DQEBBQUAMHAxCzAJBgNVBAYTAlVTMRgw MIIDAjCCAmsCEDnKVIn+UCIy/jLZ2/sbhBkwDQYJKoZIhvcNAQEFBQAwgcEx MIIDAzCCAmygAwIBAgIBATANBgkqhkiG9w0BAQQFADCBuzELMAkGA1UEBhMC MIID+DCCAuACEQDQHkCLAAACfAAAAAcAAAABMA0GCSqGSIb3DQEBBQUAMIG5 MIID+DCCAuCgAwIBAgIRANAeQJAAACdLAAAAAQAAAAQwDQYJKoZIhvcNAQEF MIIDIzCCAoygAwIBAgIENeHvHjANBgkqhkiG9w0BAQUFADBPMQswCQYDVQQG MIIDnjCCAoagAwIBAgILAgAAAAAA1ni50a8wDQYJKoZIhvcNAQEEBQAwVzEL MIIDrDCCApSgAwIBAgILAgAAAAAA1ni41sMwDQYJKoZIhvcNAQEEBQAwVzEL MIIDrDCCApSgAwIBAgILAgAAAAAA1ni4jY0wDQYJKoZIhvcNAQEEBQAwVzEL MIIDrDCCApSgAwIBAgILAgAAAAAA1ni4N88wDQYJKoZIhvcNAQEEBQAwVzEL MIIDRzCCArCgAwIBAgIENm3FGDANBgkqhkiG9w0BAQUFADBQMQswCQYDVQQG MIIDtjCCAp6gAwIBAgICAbYwDQYJKoZIhvcNAQEFBQAwcDELMAkGA1UEBhMC MIIDTTCCAragAwIBAgIENm6ibzANBgkqhkiG9w0BAQUFADBSMQswCQYDVQQG MIIDVTCCAj0CAgGoMA0GCSqGSIb3DQEBBQUAMHAxCzAJBgNVBAYTAlVTMRgw MIIEAjCCAuoCEQDQHkCKAAACfAAAAAMAAAABMA0GCSqGSIb3DQEBBQUAMIG+ MIIEBDCCAuygAwIBAgICAIUwDQYJKoZIhvcNAQEFBQAwgZYxCzAJBgNVBAYT MIIENTCCA56gAwIBAgIBAjANBgkqhkiG9w0BAQQFADCBvDELMAkGA1UEBhMC MIIENTCCA56gAwIBAgIBAzANBgkqhkiG9w0BAQQFADCBvDELMAkGA1UEBhMC MIIENTCCA56gAwIBAgIBBDANBgkqhkiG9w0BAQQFADCBvDELMAkGA1UEBhMC MIIENTCCA56gAwIBAgIBBTANBgkqhkiG9w0BAQQFADCBvDELMAkGA1UEBhMC MIIRIjCCCQoCAQAwDQYJKoZIhvcNAQEFBQAwVzEPMA0GA1UEChMGVGhhd3Rl -- no authentification with CA certificates https://bugs.launchpad.net/bugs/246205 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs