I'm playing with version 1.7.10 on PC and I seem to be unable to use the Shift and right-click, for instance to put two droppers on top of each other facing up or down. I have already read several posts with similar problems and all of them suggested these fixes:
- turn screen mode on/off
- try with both left and right shift
- click F11 twice
- try shift ENTER instead
- try with right shift and control
- try with left shift and control
- press the "pick block" key and try again
- restart game
- download minecraft again and re-install
- update LWJGL
I have tried all except the last one - I don't see how a "game developing API" should have anything to do with it, the game should run fine with the newest version of JRE. Although I can put two droppers next to each other using a temporary block, this only works if the droppers are not facing up or down. Are there any other solutions I haven't mentioned already?