Space Key doesn't work in all directions.

So I've implemented a "Jump" function to my game which uses 8-dir movement and originally wanted to use Space to activate it. For some reason when the character is Walking to the North West the character won't jump.

I've set "Jump" to Shift for now and it works fine but I am just wondering why the Space key has an issue while Shift doesn't.

Here is my .capx

Arrow Keys to Move and Space (or if you switch it back, Shift) to Jump

This is a hardware issue that some keyboards have. The only way you can fix it is by changing the keys you use.

http://www.microsoft.com/appliedsciences/antighostingexplained.mspx