Andrew, there's a bug in the snap tool, where after drawing a line and then repeating the action with the tool still 'open', snapping stops working. I haven't tried the other snapping tools, but it is the orthographical restrict tools that I am noticing the bug.
I should point out that the Autosnap feature seems to dominate, and in order to return to the original choice, I have to deselect the restrict tool, then re-select again. It dramatically slows down workflow.
It would be really great if this persistent auto snap could be disabled. For the work I do, I use the grid very often and as the mode always defaults back to auto, it does slow down workflow very much. I would like the snap setting to stay as it is set and only change when I need it to change. I had hoped this last update would have removed this feature.
PS - look forward to reading the Qcad book, which I have ordered.