Version:           CVS (using KDE KDE 3.1.1)
Installed from:    Debian testing/unstable Packages
OS:          Linux

#define when creating a class in a namespace should be different to avoid classname collision:
for instance

for class N1::A
--------------------

#ifndef N1_A_H
#define N1_A_H
namespace N1 { class A; }

and class N2::A
---------------------

#ifndef N2_A_H
#define N2_A_H
namespace N2 { class A; }
#endif