I just did a full reinstall and upgrade of the OS on my home server (from Ubuntu 10.04 desktop to Ubuntu 10.10 server).

The boinc client worked swimmingly before, but after the OS upgrade and client reinstall nothing happens - the boinc-client runs, but uses ~0% CPU and doesn't start any WUs.

Here's what I did (command line only, I'm running headless):

Install and connect:

$ sudo apt-get install boinc-client
$ boinccmd --project_attach http://www.worldcommunitygrid.org/ <hex user key>

Check that it's running:

$ ps -ef | grep boinc
boinc     6256     1  0 14:23 ?        00:00:06 /usr/bin/boinc [...snip...]

Check settings:

$ boinc-cmd --get_state
======== Projects ========
1) -----------
   name: World Community Grid
   master URL: http://www.worldcommunitygrid.org/
   user_name: waitingForTheMiracle
   team_name: Team Norway
   resource share: 100.000000
   user_total_credit: 100459.940272
   user_expavg_credit: 1136.752770
   host_total_credit: 0.000000
   host_expavg_credit: 0.000000
   nrpc_failures: 0
   master_fetch_failures: 0
   master fetch pending: no
   scheduler RPC pending: no
   attached via Account Manager: no
   ended: no
   suspended via GUI: no
   don't request more work: no
   disk usage: 0.000000
   last RPC: 1293976903.395583
   project files downloaded: 1293974885.168172

[... snip ...]

======== Applications ========
1) -----------
   name: cep2
   Project: World Community Grid

======== Application versions ========

======== Workunits ========

======== Results ========

So it finds my user and has downloaded one application (there used to be half a dozen) but no WUs.

Boinc log:

$ tail /var/lib/boinc-client/stdoutdae.txt 
02-Jan-2011 15:10:01 [World Community Grid] Sending scheduler request: To fetch work.
02-Jan-2011 15:10:01 [World Community Grid] Requesting new tasks
02-Jan-2011 15:10:04 [World Community Grid] Scheduler request completed: got 1 new tasks
02-Jan-2011 15:10:04 [World Community Grid] Message from server: Resent lost result E200922_629_A.27.C21H11NS4Se.1.4.set1d06_1
02-Jan-2011 15:10:04 [World Community Grid] [error] App version has unsupported platform i686-pc-linux-gnu
02-Jan-2011 15:10:04 [World Community Grid] [error] No application found for task: i686-pc-linux-gnu 637 ; discarding

It looks like I lost a WU during the reinstall (sorry ..), but what's up with the "unsupported platform"? It's the same hardware and (almost) the same OS - the previous one was 64-bit too.

It's more than a year since the last time I installed the Linux command line client, so I may have made a mistake somewhere.

Can someone point me in the right direction, please?