When i click detatch all hosts now for a project and go on to a host computer to synchronise it, nothing changes. Also, i've got several hosts that either the manager doesn't show statistics for them, saying they have no credit or are not part of BOINC something-or-other. In adition, some of the hosts i have simply seem to start running out of tasks (no new downloaded tasks for some projects), even though the projects have not finished and there is definately no option selected to say that they should stop downloading.
Finally, i have two computers running on a service intall of boinc 5.10.45 (because the new versions don't work on them). One displays the screensaver, but the other says there is an unspecified error.

Thanks for any ideas.