This machine has been running for a while, had a power failure and shut it down' I started receiving the errors on existing tasks. I tried many things no avail. I detached and re-attached to the project and continue to have issues.
Using SLES 9 and boinc 5.10...

Any help would be appreciated...

[World Community Grid] Requesting 1 seconds of new work
1999-12-08 02:39:06 [---] Project communication failed: attempting access to reference site
1999-12-08 02:39:07 [---] Access to reference site succeeded - project servers may be temporarily down.
1999-12-08 02:39:09 [World Community Grid] Scheduler request failed: peer certificate cannot be authenticated with known CA certificates
1999-12-08 02:39:09 [World Community Grid] Deferring communication for 1 min 0 sec
1999-12-08 02:39:09 [World Community Grid] Reason: scheduler request failed
1999-12-08 02:40:13 [World Community Grid] Sending scheduler request: Project initialization
1999-12-08 02:40:13 [World Community Grid] Requesting 1 seconds of new work
1999-12-08 02:40:14 [---] Project communication failed: attempting access to reference site
1999-12-08 02:40:15 [---] Access to reference site succeeded - project servers may be temporarily down.
1999-12-08 02:40:18 [World Community Grid] Scheduler request failed: peer certificate cannot be authenticated with known CA certificates
1999-12-08 02:40:18 [World Community Grid] Deferring communication for 1 min 0 sec
1999-12-08 02:40:18 [World Community Grid] Reason: scheduler request failed