Ok, this one has me stumped. I have a functioning installation of
GeoServer 2.1rc5 that I am trying to migrate over to a newer, much
beefier server. Both servers are 64-bit Linux servers; the old one
running SuSE 9.4 and new one version 11.1. Other than the OS and the
better hardware, however, the two environments are prety much
identical: same Tomcat version (5.5.33), same JVM version (1.6.0_26
64-bit).
To minimize problems while testing the new server is running with an
exact copy of the geoserver webapp and data directory (the two servers
use identical file system layouts.) It *should* behave identically.
Except, it doesn't.

The problem I've run into is with my BlueMarble 500m layer. It's
configured in GS as six GeoTIFFs, and a custom geowebcache.xml that
publishes them as a single cached layer through GWC:

<wmsLayer>
<name>bluemarble-500m</name>
<mimeFormats>
<string>image/jpeg</string>
</mimeFormats>
<wmsUrl>
<string>http://localhost:8080/geoserver/wms</string>
</wmsUrl>
<wmsLayers>public:BlueMarble500mA1,public:BlueMarble500mA2,public:BlueMarble500mB1,public:BlueMarble500mB2,public:BlueMarble500mC1,public:BlueMarble500mC2,public:BlueMarble500mD1,public:BlueMarble500mD2</wmsLayers>
<tiled>false</tiled>
<transparent>false</transparent>
</wmsLayer>

On the old server this works fine, and I end up with a nice tiled &
cached world map for my clients. On the new server however, GWC seems
to be duplicating the same tiles over and over, and I end up with
this:

http://llmap.org/gwc-tiling-error.png

What really confuses me is that s similarly configured GWC layer using
vector data sources works just fine, and the same GeoTIFF layers
published as an uncached layer group in geoserver also renders
fine...unless I try to view the layer group through GWC, at which
point I end up with the same mangled map.

I get the same results if I update the new server to GeoServer 2.1 or
2.1.1. Since I'm not seeing anything in Google about GWC generating
incorrect tiles I'm hoping I just did something silly here that I'm
not seeing. Any clues?

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