[OSM-talk] Stale tiles?

[Maarten Deen]

I did an update this morning on this area [1] with the webstart version 
of JOSM, but for some reason mapnik does not render the tiles.
What's more, tile 18/135429/87151 shows as clean, but rendered on june 
9th. The wiki [3] states that tiles older than 7 days will be marked 
dirty.
Other tiles are also all clean and rendered yesterday or earlier.

What's the process for marking the tiles dirty and why doesn't it work 
ATM?

[1] 
<http://www.openstreetmap.org/?lat=51.522059&lon=5.984828&zoom=18&layers=M>
[2] <http://a.tile.openstreetmap.org/18/135429/87151.png/status>
[3] <http://wiki.openstreetmap.org/wiki/Slippy_map>

Regards,
Maarten