I am getting:

8/13/2009 4:54:07 PM|GPUGRID|Sending scheduler request: To fetch work. Requesting 3224249 seconds of work, reporting 0 completed tasks
8/13/2009 4:54:12 PM|GPUGRID|Scheduler request completed: got 0 new tasks
8/13/2009 4:54:12 PM|GPUGRID|Message from server: No work sent
8/13/2009 4:54:12 PM|GPUGRID|Message from server: Full-atom molecular dynamics on Cell processor is not available for your type of computer.

I encounter this with both the 186 driver and the newer 190 driver on Windows XP SP3. I have the 9800GT.

It seems with enough retries I sometimes do get a work unit. I was letting my cache drain out before, so as to not have a backlog of two or three work units available. Seems that this approach is not the right way to go at the moment.

It is a bit confusing as the server status indicates there are 100's of work units available.

Same here, with 2x 8800GT's and 1x 9500GT. Not sure what to make of it. It last downloaded about 10 hours ago, and has since returned a couple WU's. Running BOINC 6.5.0 and 190.38 driver. We'll see what happens; these things often resolve themselves after a while.

Looks like it was related to the disk space problems folks here have periodically had to deal with. Resolved (for the moment) now.

Same here, with 2x 8800GT's and 1x 9500GT. Not sure what to make of it. It last downloaded about 10 hours ago, and has since returned a couple WU's. Running BOINC 6.5.0 and 190.38 driver. We'll see what happens; these things often resolve themselves after a while.