Version:           3.4.0 (using KDE KDE 3.5.5)
Installed from:    Ubuntu Packages

The switching correct identification of implementaion/declartion of functions is broken with namespace.
E.g. function declared in .h as 
std::vector<int> foo(std::vector<int>);

an then implemented in .cpp as
using namespace std;
vector<int> foo(vector<int>)
{
}

are not correctly "paired". The strange thing is that sometimes it seems it is able to understand that they are the same function, sometimes it doesnt.
Once the function is recognized, by adding std:: in the .cpp,  even removing the ::std the functions stays paired.