As per description. Running Nightly 32.0a1 (2014-05-15) Site: http://www.polymer-project.org/
Can you provide some crash IDs? They would be listed under about:crashes .
It seems to be working now. I'm guessing something in the updated Nightly resolved the issue and It's no longer crashing. I'm not sure the last time I visited the site where it crashed and I can't seem to find a crash report that was obviously caused by this site. I'll re-open if I encounter the issue again.