title attribute cause issue in firefox

[gaplyk]

subject.

example:
<polymer-element .... attributes="title">

[robdodson]

title is a built-in attribute and (to my knowledge) cannot be replaced with a polymer attribute. You'll have to name your attribute something different like data-title or my-title

[gaplyk]

i know. and this take some time to understand. Maybe better to add checks to attributes or display readable error message. I think also behavior in different browsers should be the same.

[sjmiles]

See #379

[sorvell]

Closed in favor of #123