I have a global-ignores setup at root to ignore Debug.win32, and it works fine except this particular folder that does not ignore it
D:\Dev\GAMECLOUD\CODE\sample\client\Capital\cocos2d\external\recast\proj.win32\Debug.win32
I have copied this offending folder to other folders in the project and it gets ignored properly. So it is only this folder that causes it not the ignored.
http://cyberversion.com/private/svnignore.jpg