I can confirm this now, too.
Using boinc 6.2.12-1 and ca-certificates 20080514-0ubuntu1 on Ubuntu Intrepid.
I've done "dpkg-reconfigure ca-certificates", but all certs were enabled already and it made no difference after restarting boinc-client.
It looks like WCG has a new certificate, from a new issuer ("Entrust.net Secure Server CA"), which is included in the upstream boinc package, but not in ca-certificates.
I've extracted the "Entrust.net Secure Server CA" from BOINC's cert bundle, pasted it into /usr/share/ca-certificates/entrust.crt" and then activated it from "dpkg-reconfigure ca-certificates".
Now, the data could be uploaded to WCG successfully again.
I can confirm this now, too.
Using boinc 6.2.12-1 and ca-certificates 20080514-0ubuntu1 on Ubuntu Intrepid.
I've done "dpkg-reconfigure ca-certificates", but all certs were enabled already and it made no difference after restarting boinc-client.
It looks like WCG has a new certificate, from a new issuer ("Entrust.net Secure Server CA"), which is included in the upstream boinc package, but not in ca-certificates.
I've extracted the "Entrust.net Secure Server CA" from BOINC's cert bundle, pasted it into /usr/share/ ca-certificates /entrust. crt" and then activated it from "dpkg-reconfigure ca-certificates".
Now, the data could be uploaded to WCG successfully again.