I don't think this is the case, I've installed the following packages (all version 2.8.4.0-0):
wx2.8-headers
libwxbase2.8-0
ibwxbase2.8-dev
libwxgtk2.8-0
libwxgtk2.8-dev
wx2.8-i18n
I've alse checked the actual presence of the include files in the include path, in fact there's no error message complaining about missing header files.
I need to compile codeblocks myself because I wan't to use the QTWorkbench plugin, otherwise I would use a deb distribution.
Thank you
Gianluca
PS: the kubuntu installation is a clean one with all updates installed.