Dual-wielding doesn't work with swords, because when you right click with a sword it still blocks with it
The first screenshot is holding a sword (in hotbar/dominant hand) and a torch in the other slot. When I right-click it blocks with the sword.
The seconds screenshot is the same but holding an axe, and when I right-click it lets me place the torch.
This happens both in creative and survival
Environment
Windows 8.1 Pro, Java 8 update 51 (MC using update 25?)
Linked issues
is duplicated by 6
1 more links
because shields aren't added yet