I had the same issue when I reinstalled that version of Dev-C++ so it's definitely a common thing. Either your installation is corrupt, or you have more than one mingw installation on your system.
Version 4.9.9.2 is pretty antiquated (February 2005).
I'd suggest uninstalling it and downoad the latest version 5.4.0 instead. Note, this is Orwell Dev-C++ which is currently maintained, last update was five days ago: http://orwelldevcpp.blogspot.co.uk/