Ran make check-devel and make check-all (for more comprehensive testing) - same error messages - not even sure where to look in tests or Examples for 'help' - no logs, or files with .fail extension or anything I might *guess* to look for. I've never had this problem before - the only thing different on the box from when I had 2.9.0 running fine is 1. change from Fedora Core 8 -> CentOS 5.3 2. ACML updated from 4.2.0 -> 4.3.0 Thats it! Unless AMCL 4.3.0 is doing something 'weird', I'm stumped.