Getting workunit errors and downloaded WUs seem to FAIL on Ubuntu 10.04LTS

After 4 months of bring offline, I'm trying to reconnect. I have a an 8-core i7 box with Nvidia GPU

I manually aborted several workunits, then triggered the "1 workunit max per day" mode.

Things still don't seem happy, I'm getting to the Internet through a tethered cell phone via T-mobile, and browsing and web surfing are all OK (but slowed to 10KBytes/sec while I'm over my wireless "quota") Here are the representative SETI messages:

What log files or debugging can I enable to figure out why tasks are getting
hosed on download? The only hardware thing I've done to the machine recently is add 12G of RAM, bring the total to 18G. My GPU is a 250-series, so I only have single-precision GPU, so Milkyway@home doesn't like me anymore.

Wed 25 Jan 2012 04:02:03 AM EST SETI@home Reporting 39 completed tasks, requesting new tasks for CPU and GPU
Wed 25 Jan 2012 04:02:33 AM EST SETI@home Scheduler request completed: got 0 new tasks
Wed 25 Jan 2012 04:02:33 AM EST SETI@home Message from server: No tasks sent
Wed 25 Jan 2012 04:02:33 AM EST SETI@home Message from server: No tasks are available for SETI@home Enhanced
Wed 25 Jan 2012 04:02:33 AM EST SETI@home Message from server: No tasks are available for Astropulse v5
Wed 25 Jan 2012 04:02:33 AM EST SETI@home Message from server: This computer has finished a daily quota of 1 tasks
Wed 25 Jan 2012 04:02:33 AM EST SETI@home General prefs: from SETI@home (last modified 25-Jan-2012 04:01:05)
Wed 25 Jan 2012 04:02:33 AM EST SETI@home Computer location: work
Wed 25 Jan 2012 04:02:33 AM EST SETI@home General prefs: no separate prefs for work; using your defaults
Wed 25 Jan 2012 04:02:33 AM EST Reading preferences override file
Wed 25 Jan 2012 04:02:33 AM EST Preferences limit memory usage when active to 9047.04MB
Wed 25 Jan 2012 04:02:33 AM EST Preferences limit memory usage when idle to 16284.66MB
Wed 25 Jan 2012 04:02:33 AM EST Preferences limit disk usage to 6.00GB
Wed 25 Jan 2012 04:02:33 AM EST Preferences limit # CPUs to 7
Wed 25 Jan 2012 04:02:34 AM EST SETI@home Started download of setiathome_6.03_i686-pc-linux-gnu
Wed 25 Jan 2012 04:02:34 AM EST SETI@home Started download of ap_29se11ae_B1_P1_00253_20120117_05363.wu
Wed 25 Jan 2012 04:03:20 AM EST SETI@home Finished download of setiathome_6.03_i686-pc-linux-gnu
Wed 25 Jan 2012 04:03:20 AM EST SETI@home Started download of ap_11oc11ah_B6_P0_00243_20120124_11734.wu
Wed 25 Jan 2012 04:05:47 AM EST SETI@home Finished download of ap_29se11ae_B1_P1_00253_20120117_05363.wu
Wed 25 Jan 2012 04:05:47 AM EST SETI@home Started download of ap_11oc11ah_B5_P0_00277_20120124_09803.wu
Wed 25 Jan 2012 04:05:47 AM EST SETI@home [error] File ap_29se11ae_B1_P1_00253_20120117_05363.wu has wrong size: expected 8392049, got 651264
Wed 25 Jan 2012 04:05:47 AM EST SETI@home [error] Checksum or signature error for ap_29se11ae_B1_P1_00253_20120117_05363.wu
Wed 25 Jan 2012 04:07:39 AM EST SETI@home Sending scheduler request: To fetch work.
Wed 25 Jan 2012 04:07:39 AM EST SETI@home Reporting 1 completed tasks, requesting new tasks for GPU
Wed 25 Jan 2012 04:08:00 AM EST SETI@home Scheduler request completed: got 0 new tasks
Wed 25 Jan 2012 04:08:00 AM EST SETI@home Message from server: No tasks sent
Wed 25 Jan 2012 04:08:00 AM EST SETI@home Message from server: No tasks are available for SETI@home Enhanced
Wed 25 Jan 2012 04:08:00 AM EST SETI@home Message from server: No tasks are available for Astropulse v5
Wed 25 Jan 2012 04:08:00 AM EST SETI@home Message from server: This computer has finished a daily quota of 1 tasks
Wed 25 Jan 2012 04:08:00 AM EST SETI@home General prefs: from SETI@home (last modified 25-Jan-2012 04:05:00)
Wed 25 Jan 2012 04:08:00 AM EST SETI@home Computer location: work
Wed 25 Jan 2012 04:08:00 AM EST SETI@home General prefs: no separate prefs for work; using your defaults
Wed 25 Jan 2012 04:08:00 AM EST Reading preferences override file
Wed 25 Jan 2012 04:08:00 AM EST Preferences limit memory usage when active to 9047.04MB
Wed 25 Jan 2012 04:08:00 AM EST Preferences limit memory usage when idle to 16284.66MB
Wed 25 Jan 2012 04:08:00 AM EST Preferences limit disk usage to 6.00GB
Wed 25 Jan 2012 04:08:00 AM EST Preferences limit # CPUs to 7
Wed 25 Jan 2012 04:10:42 AM EST SETI@home Finished download of ap_11oc11ah_B6_P0_00243_20120124_11734.wu
Wed 25 Jan 2012 04:10:42 AM EST SETI@home Started download of ap_11oc11ah_B6_P1_00355_20120124_02614.wu
Wed 25 Jan 2012 04:10:42 AM EST SETI@home [error] File ap_11oc11ah_B6_P0_00243_20120124_11734.wu has wrong size: expected 8392049, got 1368064
Wed 25 Jan 2012 04:10:42 AM EST SETI@home [error] Checksum or signature error for ap_11oc11ah_B6_P0_00243_20120124_11734.wu
Wed 25 Jan 2012 04:13:04 AM EST SETI@home Finished download of ap_11oc11ah_B5_P0_00277_20120124_09803.wu
Wed 25 Jan 2012 04:13:04 AM EST SETI@home Started download of ap_11oc11ah_B3_P0_00197_20120124_21598.wu
Wed 25 Jan 2012 04:13:04 AM EST SETI@home [error] File ap_11oc11ah_B5_P0_00277_20120124_09803.wu has wrong size: expected 8392047, got 1007616
Wed 25 Jan 2012 04:13:04 AM EST SETI@home [error] Checksum or signature error for ap_11oc11ah_B5_P0_00277_20120124_09803.wu
____________

After my mobile ISP lifted my data rate caps, I can now download Einstein@home workunits.

However, SETI is still stuck in "HTTP error land" - this has been going on for nearly two weeks now... I set my BOINC download rate to 200 kbps , and Einstein at home cruňches just fine.

Is there a way to force download of a CPU-only SETI@home client? Seems prudent to rule out all the other possible issues....

Thanks!

- Ralph

Here are the recent error messages:

Sun 05 Feb 2012 11:06:05 PM EST SETI@home Started download of setiathome-5.28_AUTHORS
Sun 05 Feb 2012 11:06:05 PM EST SETI@home Started download of setiathome-5.28_COPYING
Sun 05 Feb 2012 11:06:09 PM EST SETI@home Temporarily failed download of setiathome-5.28_AUTHORS: HTTP error
Sun 05 Feb 2012 11:06:09 PM EST SETI@home Backing off 2 hr 13 min 47 sec on download of setiathome-5.28_AUTHORS
Sun 05 Feb 2012 11:06:09 PM EST SETI@home Temporarily failed download of setiathome-5.28_COPYING: HTTP error
Sun 05 Feb 2012 11:06:09 PM EST SETI@home Backing off 57 min 42 sec on download of setiathome-5.28_COPYING
Sun 05 Feb 2012 11:06:09 PM EST SETI@home Started download of setiathome-5.28_COPYRIGHT
Sun 05 Feb 2012 11:06:09 PM EST SETI@home Started download of setiathome-5.28_README
Sun 05 Feb 2012 11:06:11 PM EST SETI@home Temporarily failed download of setiathome-5.28_COPYRIGHT: HTTP error
Sun 05 Feb 2012 11:06:11 PM EST SETI@home Backing off 1 min 18 sec on download of setiathome-5.28_COPYRIGHT
Sun 05 Feb 2012 11:06:11 PM EST SETI@home Temporarily failed download of setiathome-5.28_README: HTTP error
Sun 05 Feb 2012 11:06:11 PM EST SETI@home Backing off 1 min 0 sec on download of setiathome-5.28_README

____________

Also, based on advice in other threads in 2011, I've done a "reset project", which force a new download of .png files.

Are there any SETI Server problems that would cause this? Should I try downloading the files manually with wget? It seems like the problems are BOINC communicated with the SETI project servers.

Sun 05 Feb 2012 11:22:33 PM EST SETI@home Resetting project
Sun 05 Feb 2012 11:22:42 PM EST SETI@home update requested by user
Sun 05 Feb 2012 11:22:50 PM EST SETI@home work fetch resumed by user
Sun 05 Feb 2012 11:22:53 PM EST SETI@home resumed by user
Sun 05 Feb 2012 11:28:17 PM EST SETI@home Message from server: No tasks sent
Sun 05 Feb 2012 11:28:17 PM EST SETI@home Message from server: No tasks are available for SETI@home Enhanced
Sun 05 Feb 2012 11:28:17 PM EST SETI@home Message from server: No tasks are available for Astropulse v5
Sun 05 Feb 2012 11:32:39 PM EST SETI@home Started download of arecibo_181.png
Sun 05 Feb 2012 11:32:39 PM EST SETI@home Started download of sah_40.png
Sun 05 Feb 2012 11:32:41 PM EST SETI@home Temporarily failed download of arecibo_181.png: HTTP error
Sun 05 Feb 2012 11:32:41 PM EST SETI@home Backing off 1 min 0 sec on download of arecibo_181.png
Sun 05 Feb 2012 11:32:41 PM EST SETI@home Temporarily failed download of sah_40.png: HTTP error
Sun 05 Feb 2012 11:32:41 PM EST SETI@home Backing off 1 min 0 sec on download of sah_40.png

I've tried manual download as well, and it returns a 502 HTTP error.
Einstein at home is running fine, but the BOINC/SETI@home combo can't
download:

.png files
workunits
updated binaries and the files with names ending in _COPYING, etc.

What should I try next?

rh@sagan:~/Music$ wget http://boinc2.ssl.berkeley.edu/sg_images/sah_40.png
--2012-02-05 23:51:53-- http://boinc2.ssl.berkeley.edu/sg_images/sah_40.png
Resolving boinc2.ssl.berkeley.edu... 208.68.240.18, 208.68.240.13
Connecting to boinc2.ssl.berkeley.edu|208.68.240.18|:80... connected.
HTTP request sent, awaiting response... 502 Bad Request
2012-02-05 23:51:54 ERROR 502: Bad Request.