On Mon, Nov 8, 2010 at 5:23 AM, Thom Brown <thom(at)linux(dot)com> wrote:
> Implicit casting might bite you since that was removed in 8.3.
>
Also if you use bytea fields to store binary data, the encoding format
on return of the data is different. Make sure your client library
handles that for you (or explicitly code for it).
These are the two major issues we had to address between our
8.1->8.3->9.0 update over the last few years.