Perhaps you have the previous wxGTK libraries installed in the default directory (/usr/lib ? ) and the new , self-compiled 2.8.9 ones installed elsewhere (/usr/local/lib??).
Have a look at where 'make install' copied your files,
or do a
find /usr -name "libwx*"
to see if you have multiple sets .
THX!
I think you arre right

here the output
root@Slacky:~# find /usr -name "libwx*"
/usr/lib/libwx_baseu-2.8.so.0.0.0
/usr/lib/libwx_baseu_net-2.8.so.0.0.0
/usr/lib/libwx_gtk2u_core-2.8.so.0.0.0
/usr/lib/libwx_gtk2u_adv-2.8.so.0.0.0
/usr/lib/libwx_gtk2u_html-2.8.so.0.0.0
/usr/lib/libwx_gtk2u_qa-2.8.so.0.0.0
/usr/lib/libwx_baseu_xml-2.8.so.0.0.0
/usr/lib/libwx_gtk2u_xrc-2.8.so.0.0.0
/usr/lib/libwx_gtk2u_aui-2.8.so.0.0.0
/usr/lib/libwx_gtk2u_richtext-2.8.so.0.0.0
/usr/lib/libwx_gtk2u_gizmos-2.8.so.0.0.0
/usr/lib/libwx_gtk2u_gizmos_xrc-2.8.so.0.0.0
/usr/lib/libwx_gtk2u_stc-2.8.so.0.0.0
/usr/lib/libwx_gtk2u_ogl-2.8.so.0.0.0
/usr/lib/libwx_gtk2u_ogl-2.8.so.0
/usr/lib/libwx_gtk2u_stc-2.8.so.0
/usr/lib/libwx_gtk2u_gizmos_xrc-2.8.so.0
/usr/lib/libwx_gtk2u_gizmos-2.8.so.0
/usr/lib/libwx_gtk2u_richtext-2.8.so.0
/usr/lib/libwx_gtk2u_aui-2.8.so.0
/usr/lib/libwx_gtk2u_xrc-2.8.so.0
/usr/lib/libwx_baseu_xml-2.8.so.0
/usr/lib/libwx_gtk2u_qa-2.8.so.0
/usr/lib/libwx_gtk2u_html-2.8.so.0
/usr/lib/libwx_gtk2u_adv-2.8.so.0
/usr/lib/libwx_gtk2u_core-2.8.so.0
/usr/lib/libwx_baseu_net-2.8.so.0
/usr/lib/libwx_baseu-2.8.so.0
/usr/lib/libwx_baseu-2.8.so
/usr/lib/libwx_baseu_net-2.8.so
/usr/lib/libwx_gtk2u_core-2.8.so
/usr/lib/libwx_gtk2u_adv-2.8.so
/usr/lib/libwx_gtk2u_html-2.8.so
/usr/lib/libwx_gtk2u_qa-2.8.so
/usr/lib/libwx_baseu_xml-2.8.so
/usr/lib/libwx_gtk2u_xrc-2.8.so
/usr/lib/libwx_gtk2u_aui-2.8.so
/usr/lib/libwx_gtk2u_richtext-2.8.so
/usr/lib/libwx_gtk2u_gizmos-2.8.so
/usr/lib/libwx_gtk2u_gizmos_xrc-2.8.so
/usr/lib/libwx_gtk2u_stc-2.8.so
/usr/lib/libwx_gtk2u_ogl-2.8.so
/usr/lib/autopackage/libwx_base-2.6.so
/usr/lib/autopackage/libwx_base-2.6.so.0
/usr/lib/autopackage/libwx_base-2.6.so.0.3.1
/usr/lib/autopackage/libwx_base_net-2.6.so
/usr/lib/autopackage/libwx_base_net-2.6.so.0
/usr/lib/autopackage/libwx_base_net-2.6.so.0.3.1
/usr/lib/autopackage/libwx_base_xml-2.6.so
/usr/lib/autopackage/libwx_base_xml-2.6.so.0
/usr/lib/autopackage/libwx_base_xml-2.6.so.0.3.1
/usr/lib/autopackage/libwx_gtk2_adv-2.6.so
/usr/lib/autopackage/libwx_gtk2_adv-2.6.so.0
/usr/lib/autopackage/libwx_gtk2_adv-2.6.so.0.3.1
/usr/lib/autopackage/libwx_gtk2_core-2.6.so
/usr/lib/autopackage/libwx_gtk2_core-2.6.so.0
/usr/lib/autopackage/libwx_gtk2_core-2.6.so.0.3.1
/usr/lib/autopackage/libwx_gtk2_media-2.6.so
/usr/lib/autopackage/libwx_gtk2_media-2.6.so.0
/usr/lib/autopackage/libwx_gtk2_media-2.6.so.0.3.1
/usr/lib/autopackage/libwx_gtk2_qa-2.6.so
/usr/lib/autopackage/libwx_gtk2_qa-2.6.so.0
/usr/lib/autopackage/libwx_gtk2_qa-2.6.so.0.3.1
/usr/lib/libwx_gtk2u_gl-2.8.so.0.5.0
/usr/lib/libwx_gtk2u_core-2.8.so.0.5.0
/usr/lib/libwx_gtk2u_xrc-2.8.so.0.5.0
/usr/lib/libwx_gtk2u_plot-2.8.so.0.5.0
/usr/lib/libwx_gtk2u_html-2.8.so.0.5.0
/usr/lib/libwx_gtk2u_stc-2.8.so.0.5.0
/usr/lib/libwx_gtk2u_gizmos-2.8.so.0.5.0
/usr/lib/libwx_gtk2u_ogl-2.8.so.0.5.0
/usr/lib/libwx_baseu-2.8.so.0.5.0
/usr/lib/libwx_gtk2u_aui-2.8.so.0.5.0
/usr/lib/libwx_gtk2u_qa-2.8.so.0.5.0
/usr/lib/libwx_gtk2u_gizmos_xrc-2.8.so.0.5.0
/usr/lib/libwx_gtk2u_svg-2.8.so.0.5.0
/usr/lib/libwx_gtk2u_fl-2.8.so.0.5.0
/usr/lib/libwx_baseu_net-2.8.so.0.5.0
/usr/lib/libwx_gtk2u_richtext-2.8.so.0.5.0
/usr/lib/libwx_baseu_xml-2.8.so.0.5.0
/usr/lib/libwx_gtk2u_mmedia-2.8.so.0.5.0
/usr/lib/libwx_gtk2u_adv-2.8.so.0.5.0
/usr/lib/libwx_gtk2u_mmedia-2.8.so.0
/usr/lib/libwx_gtk2u_fl-2.8.so.0
/usr/lib/libwx_gtk2u_svg-2.8.so.0
/usr/lib/libwx_gtk2u_plot-2.8.so.0
/usr/lib/libwx_gtk2u_gl-2.8.so.0
/usr/lib/libwx_gtk2u_plot-2.8.so
/usr/lib/libwx_gtk2u_gl-2.8.so
/usr/lib/libwx_gtk2u_mmedia-2.8.so
/usr/lib/libwx_gtk2u_fl-2.8.so
/usr/lib/libwx_gtk2u_svg-2.8.so
/usr/local/lib/libwx_baseu-2.8.so.0
/usr/local/lib/libwx_baseu-2.8.so.0.3.0
/usr/local/lib/libwx_baseu-2.8.so
/usr/local/lib/libwx_baseu_net-2.8.so.0
/usr/local/lib/libwx_baseu_net-2.8.so.0.3.0
/usr/local/lib/libwx_baseu_net-2.8.so
/usr/local/lib/libwx_gtk2u_core-2.8.so
/usr/local/lib/libwx_gtk2u_core-2.8.so.0.3.0
/usr/local/lib/libwx_gtk2u_core-2.8.so.0
/usr/local/lib/libwx_gtk2u_adv-2.8.so.0
/usr/local/lib/libwx_gtk2u_adv-2.8.so.0.3.0
/usr/local/lib/libwx_gtk2u_adv-2.8.so
/usr/local/lib/libwx_gtk2u_html-2.8.so
/usr/local/lib/libwx_gtk2u_html-2.8.so.0.3.0
/usr/local/lib/libwx_gtk2u_html-2.8.so.0
/usr/local/lib/libwx_gtk2u_qa-2.8.so.0
/usr/local/lib/libwx_gtk2u_qa-2.8.so.0.3.0
/usr/local/lib/libwx_gtk2u_qa-2.8.so
/usr/local/lib/libwx_baseu_xml-2.8.so.0
/usr/local/lib/libwx_baseu_xml-2.8.so.0.3.0
/usr/local/lib/libwx_baseu_xml-2.8.so
/usr/local/lib/libwx_gtk2u_xrc-2.8.so.0
/usr/local/lib/libwx_gtk2u_xrc-2.8.so.0.3.0
/usr/local/lib/libwx_gtk2u_xrc-2.8.so
/usr/local/lib/libwx_gtk2u_aui-2.8.so.0
/usr/local/lib/libwx_gtk2u_aui-2.8.so.0.3.0
/usr/local/lib/libwx_gtk2u_aui-2.8.so
/usr/local/lib/libwx_gtk2u_richtext-2.8.so
/usr/local/lib/libwx_gtk2u_richtext-2.8.so.0.3.0
/usr/local/lib/libwx_gtk2u_richtext-2.8.so.0
/usr/local/lib/libwx_base-2.8.so.0
/usr/local/lib/libwx_base-2.8.so.0.5.0
/usr/local/lib/libwx_base-2.8.so
/usr/local/lib/libwx_base_net-2.8.so.0
/usr/local/lib/libwx_base_net-2.8.so.0.5.0
/usr/local/lib/libwx_base_net-2.8.so
/usr/local/lib/libwx_gtk2_core-2.8.so.0
/usr/local/lib/libwx_gtk2_core-2.8.so.0.5.0
/usr/local/lib/libwx_gtk2_core-2.8.so
/usr/local/lib/libwx_gtk2_adv-2.8.so.0
/usr/local/lib/libwx_gtk2_adv-2.8.so.0.5.0
/usr/local/lib/libwx_gtk2_adv-2.8.so
/usr/local/lib/libwx_gtk2_html-2.8.so.0
/usr/local/lib/libwx_gtk2_html-2.8.so.0.5.0
/usr/local/lib/libwx_gtk2_html-2.8.so
/usr/local/lib/libwx_gtk2_qa-2.8.so
/usr/local/lib/libwx_gtk2_qa-2.8.so.0.5.0
/usr/local/lib/libwx_gtk2_qa-2.8.so.0
/usr/local/lib/libwx_base_xml-2.8.so.0
/usr/local/lib/libwx_base_xml-2.8.so.0.5.0
/usr/local/lib/libwx_base_xml-2.8.so
/usr/local/lib/libwx_gtk2_xrc-2.8.so.0
/usr/local/lib/libwx_gtk2_xrc-2.8.so.0.5.0
/usr/local/lib/libwx_gtk2_xrc-2.8.so
/usr/local/lib/libwx_gtk2_aui-2.8.so.0
/usr/local/lib/libwx_gtk2_aui-2.8.so.0.5.0
/usr/local/lib/libwx_gtk2_aui-2.8.so
/usr/local/lib/libwx_gtk2_richtext-2.8.so.0
/usr/local/lib/libwx_gtk2_richtext-2.8.so.0.5.0
/usr/local/lib/libwx_gtk2_richtext-2.8.so
Any suggestion about how to solve it?
Thx in advance :-)