Version:           1.5.8 (using KDE 3.5.10)
OS:                Linux
Installed from:    Ubuntu Packages

Suppose we have two files in same folder: a.h  b.h.
File "a.h" contains:

#include "b.h"
class A
{
   B* b;
};

-------- END a.h --------

file "b.h" contains:

#include "a.h"
class B
{
    A *a;
};

-------- END b.h --------

Now if i choose from menu Code->Import classes... and choose a.h file
umbrello crashes and puts segmentation fault on console.