UPDATE (June 15, 2015) : paper-ripple 1.0.1 was released on June 11, 2015, which includes a PR that fixes this problem , the fixes recommended in this answer are deprecated. Just update bower.json to bind to PolymerElements/paper-ripple#^1.0.1 .
This is a symptom of the same error that haunts another user on SO . Elements of corrugated paper are aimed at the wrong element of the node.
The fix has been merged into the official repository, but not yet released. To use it now, just use the master branch as your version in bower.json .
I would recommend keeping the releases tabs and using the actual version as your dependency instead of the master branch as soon as possible.
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