It is not possible to install an i386 arch qt RPM on an x86_64 system, due to a conflict as follows: file /usr/bin/qtconfig from install of qt-3.3.2-2 conflicts with file from package qt-3.3.2-2 This problem was also present in FC1.
It's a correct behavior of rpm. the qt for x86_64 and i386 cannot be installed coexistent. /usr/bin/qtconfig caused a file conflict, because it's already included in another rpm!
I'm sorry, but this sounds quite bogus. If that's the case, it makes it impossible to run any 32-bit qt apps on an x86_64 box. The correct thing to do is either fix the qt RPM so this conflict doesn't occur or split qt into a qt-libs and qt package, so that it's possible to run 32-bit apps on a 64-bit machine. Ignoring the problem is not a correct approach, I believe.
it's fixed in 1:3.3.2-9, it allows now multilib installation.