No. I gave it a try and postgres refused to start up.
Jesper Krogh wrote:
Is it possible to migrate from 7.4.3 - i386 to 7.4.6 - x86-64 without a dump and restore?
Jesper
---------------------------(end of broadcast)--------------------------- TIP 5: Have you checked our extensive FAQ?
http://www.postgresql.org/docs/faqs/FAQ.html