This small module I made allows ice to break when you land on it from 2.5 or more blocks high. The player will still take fall damage. This only works in survival and adventure gamemodes. Only normal ice is affected by this module, so glass and packed ice will remain solid.

Remember to turn your command block output off (/gamerule CommandBlockOutput false)

One Command Module (paste the command into a command block) : http://pastebin.com/AwFZR5qY
You might have to reset the redstone block clocks after the module has spawned. To do so, locate any red wool block or redstone block, break it and replace it by a redstone block.

This module has been updated and is now part of the Advanced Delicacy Module.

The command was created using gentlegiantJGC's mcedit filter
(http://www.mediafire.com/view/zy2bkckvb9jk5ww/one-command_structure_spawner_2_0.py)

Enjoy :)