Hi all, I experience violent crashes trying to link Boost in release. Very simple example : - I build Boost using bjam (all standard config, tool msvc-71) - I create an empty MFC project with all defaults settings except for include directories ("C:\Boost\include\boost-1_33_1") and lib directories ("C:\Boost\lib\") - I try to execute this : boost::filesystem::path::default_name_check(boost::filesystem::native); boost::filesystem::path p; p = "c:\\"; The last line works as expected in Debug but crashes in release : Unhandled exception at 0x00402917 in testboost2.exe: 0xC0000005: Access violation reading location 0x00000004. It doesn't help trying to trace the code (int this case it's in m_path_append( ) but it depends on the code being tried) Any idea ? Thanks in advance !