FATAL: incorrect checksum in control file

I am trying to do a PITR.  I have seen posts about dumping from a 32 bit to 64 bit.  But, I have not seen anything about dumping from 64 bit to 32 bit.  Could that cause a checksum error?

FATAL:  incorrect checksum in control file

Main database server (64 bit):

Linux server1 2.6.5-7.282-smp #1 SMP Tue Aug 29 10:40:40 UTC 2006 x86_64 x86_64 x86_64 GNU/Linux

Backup database server (32 bit):

Linux server2 2.6.5-7.282-bigsmp #1 SMP Tue Aug 29 10:40:40 UTC 2006 i686 i686 i386 GNU/Linux