Upgrading a RH7 box with the db3 update in http://www.redhat.com/support/errata/RHEA-2001-015.html broke a custom perl application here. Installed packages were: db1-1.85-4 db1-devel-1.85-4 db2-2.4.14-4 db3-3.1.17-5 db3-devel-3.1.17-5 db3-utils-3.1.17-5 and the perl error was: DB_File needs compatible versions of libdb & db.h you have db.h version 3.1.14 and libdb version 3.1.17 But db3-devel-3.1.17-5 should provide the correct db.h (/usr/include/db3/db.h and the symlink /usr/include/db.h)! Anyway, reverting to the 3.1.14-6 versions of the db3 packages (from stock RH7) solved the problems. But it seems there is something strange with the db3-*3.1.17-5* packages from the errata.
Perl problem. We're prepping an errata for it. *** This bug has been marked as a duplicate of 32665 ***