"Miguel Carvalho" <miguel@ipatimup.pt> writes:
> I, does any one know about any issue related to sequences generating
> duplicat id's in Postgresql 7.1.2?
There are a couple of recently-identified bugs that could cause a
sequence to roll back a few counts after a crash. 7.2.1 (due out
as soon as Marc wraps a tarball) contains fixes.
regards, tom lane