BOINC has just finished downloading new version of SETI software, and now there are problems with download of new work units - every workunit download since the new 4.05 version was installed has resulted in a combination of:
MD5 computation error,
Checksum or signature error, or an
Unrecoverable error (couldn't get input files:)

My completed workunits are also not being uploaded (although I am sure that is a seperate problem).

Can anybody explain, and/or give a procedure to correct the problems (maybe revert to the earlier verion of SETI software).

Thanking you in anticipation.

Derek