Snap to grid when moving objects not working

Hey there,

When I move an object I can’t make it snap to the grid (with snap to grid turned on obviously). I read that I have to use the Alt/Option key, but it doesn’t work either…none of the modifier keys. What’s worse it seems I can’t move objects with the cursor keys either? I can’t quite imagine that’s by design, but effectively I can’t work with any kind of precision.

Am I missing something?
I’m on the latest release on a Mac.