[OpenLayers-Users] strange request strings

[Jay Douillard]

Hello, using OL 2.7 I keep having slow loading of pre-rendered tiles (made with tilecache). When I looked at the requests with firebug I can see that OL is requesting strange images, that shouldn't exist, and getting 404 errors. 
The requested URL is:

 /cache/sdlabels/03/000/000/009/000/000/0-1.png

Code snippet:
 
sd_labels = new OpenLayers.Layer.TileCache("SD Labels",
                "/cache/","sdlabels", {               
                    type: "image/png",
                    isBaseLayer:false
                    });

I'm also getting these on TMS layers:

cache/edi_w2/03/000/000/000/-01/999/999.png.lck


Seems I'm getting a - in place of a zero?!
Thanks!


----
Jay