We had this problem with the gaim->pidgin change a while back as well.

i386 is trying to replace x86_64 and is clearly wrong.

=============================================================================
Package                 Arch       Version          Repository        Size
=============================================================================
Installing:
wxGTK                   x86_64     2.8.4-3.fc7      updates           4.4 M
     replacing  compat-wxGTK.x86_64 2.4.2-21.fc6

wxGTK                   i386       2.8.4-3.fc7      updates           4.4 M
     replacing  compat-wxGTK.x86_64 2.4.2-21.fc6


Quick question but is this fixed in the next push ?