I add geoserver wms to map. I get a picture. I pan around - and often it stop requesting anything from the server. The server doesnt get a map request, and there's no "busy" indication in udig (cpu at 0%). I never get a map. This will happen for 5 or six little pans (sometimes forever). Then it'll decide to actually do a map request and draw the image. At all times an image should be drawn (ie. the data is on-screen). I checked the geoserver bounding box for the dataset, and it looks good.