Profiling uses dbi_time() and dbi_time uses the gettimeofday() system call and the problem you
report would only happen if gettimeofday() goes backwards.
All other cases of this type have been due to clock problems on the host.
I'm closing the ticket. Replying will re-open it, but please don't do that unless you can clearly
show there's a bug in the DBI.
Thanks!