Unable to resolve identifier in std::complex specializations

The following simple compilable example produces "Unable to resolve identifier" at the marked function call:

// main.cc
#include <complex>
#include <iostream>

std::complex<double> foo2()
{
  return std::complex<double>(1.0, 0.0);
}

int main(int argc, char** argv)
{
  std::cout << foo2().real() << "\n";
  //                  ^-- Unable to resolve identifier real
  return 0;
}


I found this behavior for NB6.8 and also for NB6.9beta on Linux (Suse 11.2 64bit).


Side notes:

* NB6.8 and NB6.9beta: Navigation to the erroneously unresolved function fails (Ctrl-click on the function name real has no effect).

* NB6.9beta only: If I go to the complex header file (Ctrl-click on the filename in the include line) I find a quite big number of red marks (unexpected tokens, unresolved identifiers, etc...) To me it looks like NB failes to parse the header file <complex>.
  
* NB6.9beta only: After playing around with other sources and then eventually going back to the given sample, I found that reparsing the project (Code assistance → reparse project) changes the shown error marks:
  - Sometimes even the identifier 'complex' cannot be resolved.
  - Sometimes the include line is marked with a yellow ! saying that there are unresoveld includes inside.
  - Somtimes all red marks disappear, but unfortunately the identifiers remain unresolved (Ctrl-click on the indentifies still has no effect).