[Tilecache] ImageLayer and ArcXML errors in trunk - was Caching a raster saved on the local disk

[Fredrik Lundh]

> 256 x 256

any metatiling going on here?  I find it a bit unlikely that your
process should have room for the entire source image, but not for a
single 256x256 tile on top of that.

have you checked the memory consumption when TileCache runs?

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