i386 on Opteron system

[girish]

 Hi All,
     Is it valid to have 64 bit application/executable can call 32 bit
 libraries.
 
 Consider following scenarios,
 a) If x86_64 is installed after i386 then
         rpm -e samba.xyz.x86_64 is command executed first then rpm utility
 removes only lib64 dir.and as i386 rpm is installed earlier, it will not
 have 32 bit programs.
 b) If i386 is installed after x86_64 then
         rpm -e samba.xyz.i386 is command executed first then rpm utility
 removes only lib dir and as x86_64 rpm is installed earlier, it will not
 have 64 bit programs instead it will have 64 bit library and 32 bit
 _overwritten_ programs. 32 bit programs _never_ call 64 bit library (Hence
 is a bug)

Regards
Girish