tell your "programmer" about a brand new innovation: unit- and integration tests
Thank you, I do appreciate the advice, but like I said, that "encounter" was in the past and I did had to tell him "differently". ...I don't really know the whereabouts of that programmer from that point on.
i was a little sarcastic - 6am here...sorry
but seriously: if a developer faces the problem that any change produces more and other bugs its time to start over with proper testing (and he should not have developed it that way in the first place).