Well spotted. I'm glad you posted, as I haven't even been doing fare checks.
It's $885 out of SAN and CLD as well. I'd buy in the $700 range and get in the queue for upgrades. But a fare close to $900 bites. I'm going to keep waiting to see if the UA employees get Friends and Family certs in the fall. 15% off would certainly made any fare appealing.
Just for kicks, I checked an outbound to SIN in January, and a return from Shanghai in February. The fare popped to $1400 - so much for my hope that I could achieve a lower fare by nesting SAN-SIN/PVG-SAN and SIN-SAN/SAN-PVG.