during a check with the static code analysis tool cppcheck, i found a resource leak, I reported it to the wxWidgets developers. The told me to contact you:
http://trac.wxwidgets.org/ticket/11432
http://trac.wxwidgets.org/ticket/11194
Best regards
Orbitcowboy
should fix the leaks
Attached patch was not done against current CVS. Applied modified patch - see readfilemap.c rev. 1.15.