Comment 1 for bug 588628

Reproduced with Inkscape 0.47+devel r9469 on OS X 10.5.8

Somewhat related: same issue with disabling snapping while dragging node handles (in this case there's a conflict with interfering shortcut keys, but maybe it is the reason why the global shortcut to temporarily disabled snapping (<Shift>) doesn't work in the node tool at all?) - see the discussion in bug #538487.