The wxWidgets default version used by pgAdmin is now 2.8. If you're
building pgAdmin >1.6.0 on Mac or *nix, you'll need to upgrade to
wxWidgets 2.8.0-rc1, or add the --with-wx-version=2.7 configure option
to your build process.
The project files on Win32 are now exclusively for 2.8, so will require
editting to use the older version.
Regards, Dave.