Having just installed seti-web today, the apache error log contains the following errors:
DBD::mysql::st fetchrow_array failed: fetch() without execute() at c:\apps\SETI-W~1.3\cgi\seti.pl line 468.
DBD::mysql::st fetchrow_array failed: fetch() without execute() at c:\apps\SETI-W~1.3\cgi\seti.pl line 469.
After a quick look at the source, it seems that this script fails if there is less than 3(?) days data in the table.