Why do you believe that the reason of your crash is caused by wxGTK 2.6?
Can you please post *when* it crashes?
If it crashes when closing a search tab,
(1) you are not alone, this happens to all users of very recent distros,
(2) it is not the fault of a wxGTK RPM because it crashes for everybody, whether RPM or compiled from source or whatever,
(3) You might be able to work around it by building wxGTK against GTK 1.2 instead of 2.10, but it must still be wxGTK 2.6 and not 2.4.