I have: http://windows.github.com/
My current project has around 20k files, around 150MB (and not speaking about how slow it is and I cannot do a thing now) it doesn\'t
This happened to me. Try opening up PowerShell and manually committing each file using the "git add [file name]" command. To see which files have been added, enter "git status" into the command line. The green files have been added, the red ones have not been added.
Once you've added them all, type "git commit." Then go back to Github for Windows and sync it up.
I'm not sure what causes this issue, but once I followed the above steps, Github went back to its normal, awesome behavior.