[boost] [modular-boost] Errors on submodule update

Hi, I'm using TortoiseGit 1.8.7 with msysgit 1.8.5.2 on Windows and have checked out the develop branch of the boost repository. On every submodule update, I get the following errors. Is the submodule configuration corrupt? Git seems to believe that there are msm and polygon submodules which are not in the libs directory: ... git.exe submodule update -- "libs/msm" ... git.exe submodule update -- "libs/polygon" ... git.exe submodule update -- "msm" error: pathspec 'msm' did not match any file(s) known to git. Did you forget to 'git add'? git.exe submodule update -- "polygon" error: pathspec 'polygon' did not match any file(s) known to git. Did you forget to 'git add'? ...