I've been using Eagle light in Ubuntu lately. I have also used it in MS windows.

Overall it works the same except for one thing. The [Alt] key for placing tracks, vias etc at half grid spacings doesn't seem to work properly. Pressing the [Alt] key allows the item to hover at half grid spacings but I can't actually place it by clicking the left mouse button.

Is this problem unique to my PC or is this a bug which others are also experiencing?