that's because by default 8.4 uses integer timestamps, instead of whatever 8.3 was using. and you pretty much use something, that is suppose to be only used within the scope of the same version and hardware type (and potentially even build).
- [GENERAL] COPY BINARY 8.3 to 8.4 timestamp incorrect Chase, John
- Re: [GENERAL] COPY BINARY 8.3 to 8.4 timestamp i... Grzegorz Jaśkiewicz
- Re: [GENERAL] COPY BINARY 8.3 to 8.4 timestamp i... Tom Lane
- Re: [GENERAL] COPY BINARY 8.3 to 8.4 timesta... Chase, John
- Re: [GENERAL] COPY BINARY 8.3 to 8.4 tim... Tom Lane
- Re: [GENERAL] COPY BINARY 8.3 to 8.4 tim... Raymond O'Donnell
- Re: [GENERAL] COPY BINARY 8.3 to 8.4 timesta... Chase, John