Mac G4 PowerBook no longer downloads Einstein files

One of the three computers we have online here is not downloading Einstein@Home files for crunching.

It's a G4 PowerBook and below is the Boinc Manager dialog rom the last time it failed to download new work units:

Tue May 6 19:12:02 2008|Einstein@Home|Sending scheduler request: To fetch work. Requesting 111321 seconds of work, reporting 0 completed tasks
Tue May 6 19:12:08 2008|Einstein@Home|Scheduler request succeeded: got 1 new tasks
Tue May 6 19:12:10 2008|Einstein@Home|Started download of einstein_S5R3_4.43_powerpc-apple-darwin
Tue May 6 19:12:10 2008|Einstein@Home|Started download of einstein_S5R3_4.43_graphics_powerpc-apple-darwin
Tue May 6 19:12:11 2008|Einstein@Home|Giving up on download of einstein_S5R3_4.43_graphics_powerpc-apple-darwin: file not found
Tue May 6 19:12:11 2008|Einstein@Home|Started download of einstein_S5R3_4.43_powerpc-apple-darwin_0
Tue May 6 19:12:12 2008|Einstein@Home|Giving up on download of einstein_S5R3_4.43_powerpc-apple-darwin_0: file not found
Tue May 6 19:12:12 2008|Einstein@Home|Started download of einstein_S5R3_4.43_powerpc-apple-darwin_1
Tue May 6 19:12:13 2008|Einstein@Home|Giving up on download of einstein_S5R3_4.43_powerpc-apple-darwin_1: file not found
Tue May 6 19:12:13 2008|Einstein@Home|Started download of skygrid_1020Hz_S5R3.dat
Tue May 6 19:12:15 2008|Einstein@Home|Giving up on download of einstein_S5R3_4.43_powerpc-apple-darwin: file not found
Tue May 6 19:12:19 2008|Einstein@Home|Finished download of skygrid_1020Hz_S5R3.dat
Tue May 6 19:13:13 2008|Einstein@Home|Sending scheduler request: To fetch work. Requesting 115200 seconds of work, reporting 1 completed tasks
Tue May 6 19:13:18 2008|Einstein@Home|Scheduler request succeeded: got 1 new tasks
Tue May 6 19:13:18 2008|Einstein@Home|Got server request to delete file h1_1014.70_S5R3
Tue May 6 19:13:18 2008|Einstein@Home|Got server request to delete file l1_1014.70_S5R3
Tue May 6 19:13:20 2008|Einstein@Home|Started download of einstein_S5R3_4.43_powerpc-apple-darwin
Tue May 6 19:13:20 2008|Einstein@Home|Started download of einstein_S5R3_4.43_graphics_powerpc-apple-darwin
Tue May 6 19:13:21 2008|Einstein@Home|Giving up on download of einstein_S5R3_4.43_graphics_powerpc-apple-darwin: file not found
Tue May 6 19:13:21 2008|Einstein@Home|Started download of einstein_S5R3_4.43_powerpc-apple-darwin_0
Tue May 6 19:13:22 2008|Einstein@Home|Giving up on download of einstein_S5R3_4.43_powerpc-apple-darwin_0: file not found
Tue May 6 19:13:23 2008|Einstein@Home|Started download of einstein_S5R3_4.43_powerpc-apple-darwin_1
Tue May 6 19:13:24 2008|Einstein@Home|Giving up on download of einstein_S5R3_4.43_powerpc-apple-darwin_1: file not found
Tue May 6 19:13:24 2008|Einstein@Home|Started download of h1_1015.10_S5R3
Tue May 6 19:13:26 2008|Einstein@Home|Giving up on download of einstein_S5R3_4.43_powerpc-apple-darwin: file not found
Tue May 6 19:13:26 2008|Einstein@Home|Started download of l1_1015.10_S5R3
Tue May 6 19:13:44 2008|Einstein@Home|Finished download of h1_1015.10_S5R3
Tue May 6 19:13:46 2008|Einstein@Home|Finished download of l1_1015.10_S5R3
Tue May 6 19:14:25 2008|Einstein@Home|Sending scheduler request: To fetch work. Requesting 115200 seconds of work, reporting 1 completed tasks
Tue May 6 19:14:30 2008|Einstein@Home|Scheduler request succeeded: got 0 new tasks
Tue May 6 19:14:30 2008|Einstein@Home|Message from server: No work sent
Tue May 6 19:14:30 2008|Einstein@Home|Message from server: (reached daily quota of 2 results)

Nothing seems to have changed otherwise about the computer; it's downloading work units from two other BOINC projects fine and the two other computers we have that are online (one newer, one older) seem to be downloading work units fine as well.

I would appreciate any help with this problem you can provide.

Bests,

Herb