error compiling under Linux

i downloaded 2.2.0 rc 1 and tried to compile under a 64 bits Gentoo linux with gcc 4.1. I got this error:
../../MyGUIEngine/include/MyGUI_LogStream.h:109: error: 'MyGUI::LogStream& MyGUI::LogStream::operator<<(size_t)' cannot be overloaded
../../MyGUIEngine/include/MyGUI_LogStream.h:77: error: with 'MyGUI::LogStream& MyGUI::LogStream::operator<<(long unsigned int)'
make[2]: *** [MyGUI_ActionController.lo] Error 1
make[2]: se sale del directorio `/home/roger/projects/MyGUI_2.2.0_RC1_source/MyGUIEngine/src'
make[1]: *** [all-recursive] Error 1
make[1]: se sale del directorio `/home/roger/projects/MyGUI_2.2.0_RC1_source/MyGUIEngine'
make: *** [all-recursive] Error 1


Is there any way to solve it?

Yes, get code from svn.