Hi Chris,
The very first thing I did when AG2.4 failed to launch was "yum remove compat-AccessGrid" then "yum install compat-AccessGrid" why did compat-AccessGrid not complain about failed dependencies? when the following is what fixed the situation.
rpm -e wxPython-common-gtk2-ansi wxPython2.6-gtk2-ansi wxPython2.6-devel-gtk2-ansi compat-AccessGrid
The above RPMs don't appear from Fedora Extras 4.
Cheers, Doug