What steps will reproduce the problem? Setting breakpoint in main.cpp the program runs and exits with the following message

Debug... (gdb) Make breakpoint pending on future shared library load? (y or [n]) [answered N; input not from terminal] (gdb) (gdb) (gdb) (gdb) (gdb) Starting program: /home/larry/Documents/C++ GUI Programming with QT4 Example Code/qt-book/chap12/imageconverter/imageconverter [Thread debugging using libthread_db enabled] Program exited normally. (gdb) No source file named main.cpp.

QDevelop ver .27 Ubuntu 9.04 GDB 6.8-3ubuntu2

Yes, it's a known problem.