Iterator bug?

["Einar Otto Stangvik" <einar at grep dot no>]

uname -a
Linux monastery 2.4.19-grsec #6 SMP Tue Aug 27 14:05:00 CEST 2002 i686 unknown

gcc -v
Reading specs from /usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.2/specs
Configured with: ../gcc-3.1.1/configure 
Thread model: posix
gcc version 3.2

Possible bug:
If the header 'iterator' is included, the following will fail:

#include <string>
#include <algorithm>
#include <cctype>
#include <iterator>

using namespace std;

int main(int argc, char *argv[])
{
    string a = "hello";
    string b;
    transform(a.begin(), a.end(), b.begin(), toupper);
}

Producing the following error:

g++ t.C -o t 
t.C: In function `int main(int, char**)':
t.C:12: no matching function for call to `transform(
   __gnu_cxx::__normal_iterator<char*, std::basic_string<char, 
   std::char_traits<char>, std::allocator<char> > >, 
   __gnu_cxx::__normal_iterator<char*, std::basic_string<char, 
   std::char_traits<char>, std::allocator<char> > >, 
   __gnu_cxx::__normal_iterator<char*, std::basic_string<char, 
   std::char_traits<char>, std::allocator<char> > >, <unknown type>)'

The example is merely fictional, I know the code wouldnt serve any purpose :-)

Is this a known problem, or am I doing something wrong?

Best regards,
Einar Otto Stangvik