Almost over night, one of my product page's PR drop from 5 to 0.
At first, I thought it might be Google's datacenter updating delay. But two days passed, PR remained 0, strangely, all other pages no affected at all.
I checked the "problem" page:
1. There were totally 140+ links, only 1 outbound link;
2. No keywords stuffing
3. The page still shown in Google SERP
I have no idea what happened, should I just ignore it?