[OpenLayers-Users] misaligned kamap tiles

[Ben Brehmer]

Hello All,

I am in the process of converting a kamap application to use OpenLayers 
and in doing so have run into an occasional tile loading problem.

If you have a look at the attached screen shot you will see one valid 
tile (highlighted with firebug) and several broken (pink tiles).
The broken tiles are offset in the X and Y direction and are broken 
because they are referencing an invalid path in the kamap generated cache.

Some other observations:
-All the broken tiles are always in the same row OR column
-The broken tiles always load after every single tile in the viewport 
has loaded successfully. (ie. an extra row/column is loaded with broken 
tiles)
-This is unrelated to the OpenLayers.IMAGE_RELOAD_ATTEMPTS setting since 
the tiles are broken due to a incorrect image path (not that they are 
failing to load on the first attempt)

Any tips or possible leads would be greatly appreciated. I guess my main 
question is why would OpenLayers be trying to load extra columns/rows 
after all the columns/rows have already successfully loaded?

Also,

Thanks,

Ben

-----------------------
My map and layer setup:
--------------------------
  var options = {
    scales: [30000000, 15000000, 7500000, 4000000, 2000000, 750000, 
400000, 200000, 125000, 75000, 35000, 17500, 12000, 7500],
    maxResolution: "auto",
    minResolution: "auto",
    units: 'm',
    maxExtent: MAX_EXTENTS,
    controls: [mouseEvents]
  };

map = new OpenLayers.Map('ol_map', options);

  layer_base = new OpenLayers.Layer.KaMap("Land",
                                                            
"http://brock.simplymap.com/kamap/tile.php",
                                                            {g: 
"__base__", map: "basemap.map", layers: "def", transparent: 'true', 
mapid: '0'},
                                                            {tileSize: 
new OpenLayers.Size(200,200), srs:'epsg:99999', format: "image/gif", 
Opacity: 0.3, isBaseLayer: true});

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