No, it's the other way round.  The lib32 is correct, but the attempt to set it didn't succeed (as explained further down in the thread).

Carefully reading the error message

ld.so.1: perl: fatal: /opt/oracle/product/10.2.0/client_1/lib/libclnts
+h.so.10.1: wrong ELF class: ELFCLASS64
[download]

we see that it says the library libclntsh.so.10.1 has been found in the lib/ directory (not lib32/).  Also, the runtime linker (ld.so.1) reports the incorrect ELF class (64-bit) the found library does have, not the class it should have.  From this it follows that the perl binary in question is 32-bit. In other words, lib32 is the correct path.

</nitpick>