[GENERAL] Cast for text->Integer missing in 8.3.5

[Nykolyn, Andrew]

I am trying to upgrade my Postgres server from 8.2.3 to 8.3.5 and have
found that the cast text->integer and integer->text are missing.  Is
there a reason why they are not there and how can I get them back.  I
have many stored procedures that rely on those casts