I only recently got back into WOHD after a good 6 months + break (I stopped before the ads update, whenever that was), and it has seemed to make my Zone score on Syncopia a lot better. Traded total Zones for more Perfect Zones.

Improved to 12th I tend not to bother with the other tracks tbh, I play Zone because it gets you to focus on the game and nothing else, which is quite relaxing.

Also, this was posted by Yaster over on the Official Playstation Community Board for Wipeout HD:

Hi All



Wipeout HD is to undergo some maintenance with it's online servers.



Here's what you need to know:



Date: 20/07/2010
Start time: 10:00 UK Time
End Time: 12:00 UK Time
Might be an explanation as to why someone saw deleted Zone scores