Do you have the correct minor-version of wxWidgets installed, there are afaik packages that use 2.8.
4 and packages that use 2.8.
7.
If the last is not included in ubuntu 8.04 you can try downnloading it from wxwidgets.org (look
here).
I'm not sure if the wxWidgets-packages build for older ubuntu-versions work with 8.04, but you can try that.