Description of problem:

Attempting to upgrade tcl.x86_64 to version 1:8.5.2-2.fc9 on a 64-bit only
system pulls in tcl.i386 and glibc.i386 

Version-Release number of selected component (if applicable): 1:8.5.2-2.fc9


How reproducible: Always


Steps to Reproduce:
1. yum update tcl.x86_64 tcl-devel.x86_64
[...cut...]
--> Running transaction check
--> Processing Dependency: tcl-devel = 1:8.5.1 for package: tk-devel
---> Package tcl-devel.x86_64 1:8.5.2-2.fc9 set to be updated
---> Package tcl.x86_64 1:8.5.2-2.fc9 set to be updated
--> Processing Dependency: tcl = 1:8.5.1 for package: tk
--> Processing Dependency: tcl = 1:8.5.1-4.fc9 for package: tcl-devel
--> Running transaction check
---> Package tcl.i386 1:8.5.1-4.fc9 set to be updated
--> Processing Dependency: libc.so.6(GLIBC_2.2) for package: tcl
--> Processing Dependency: libc.so.6(GLIBC_2.3.4) for package: tcl
--> Processing Dependency: libc.so.6(GLIBC_2.4) for package: tcl
--> Processing Dependency: libc.so.6 for package: tcl
--> Processing Dependency: libc.so.6(GLIBC_2.1) for package: tcl
--> Processing Dependency: libm.so.6(GLIBC_2.0) for package: tcl
--> Processing Dependency: libdl.so.2(GLIBC_2.1) for package: tcl
--> Processing Dependency: libc.so.6(GLIBC_2.1.3) for package: tcl
--> Processing Dependency: libdl.so.2(GLIBC_2.0) for package: tcl
--> Processing Dependency: libdl.so.2 for package: tcl
--> Processing Dependency: libc.so.6(GLIBC_2.0) for package: tcl
--> Processing Dependency: libc.so.6(GLIBC_2.3) for package: tcl
--> Processing Dependency: libm.so.6 for package: tcl
---> Package tcl-devel.i386 1:8.5.1-4.fc9 set to be updated
--> Running transaction check
---> Package glibc.i386 0:2.8-3 set to be updated
--> Finished Dependency Resolution

Dependencies Resolved

=============================================================================
 Package                 Arch       Version          Repository        Size 
=============================================================================
Updating:
 tcl                     x86_64     1:8.5.2-2.fc9    updates           2.2 M
 tcl-devel               x86_64     1:8.5.2-2.fc9    updates           171 k
Installing for dependencies:
 glibc                   i386       2.8-3            fedora            4.6 M
 tcl                     i386       1:8.5.1-4.fc9    fedora            2.2 M
 tcl-devel               i386       1:8.5.1-4.fc9    fedora            171 k

Transaction Summary
=============================================================================
Install      3 Package(s)         
Update       2 Package(s)         
Remove       0 Package(s)         

Total download size: 9.3 M
Is this ok [y/N]: N
Exiting on user Command
Complete!

  
Actual results: As above


Expected results: Only use the x86_64 packages.


Additional info: This appears to be different from the issue with the Tk package
reported as Bug 453239 (there is no Tk dependency here)