I've seen plenty of other threads and comments around the web on this issue, so it seems to be a pretty widespread bug and present across different graphics cards and OSs. Anyone seen any word from a dev anywhere to confirm that they're aware of it …
Orrrr maybe not fixed. It started working as all the keys were default, but as soon as I changed a single binding (seems like a couple are an exception to this, still testing) to a non-letter binding (I use numpad keys) it all stopped working. …