[OSM-talk] Forest appearing and disapearing at different zoom levels in mapnik

[David James]

I'm sure this will be a stupid question, but ...

Some time ago (13th January) I added an approximate outline for Cropton
forest which is due north of Pickering, UK
(http://www.openstreetmap.org/?lat=54.327&lon=-0.69&zoom=10&layers=B0FT).

Noting that work has been going on in the Mapnik layer, I've been waiting
patiently for it to appear.

Yesterday (I think) it appeared at zoom levels 9 upwards.

Today it shows at zoom levels 9 and 10, is completely missing at zoom
level 11 and 12, and then some tiles show the forest and some don't at
zoom levels 13 and upwards.

I'm puzzled - I thought postings here indicated that all tiles had been
rebuilt, so why do I see differences at different zoom levels? What am I
still not understanding?

-- 
David James