I had built a python script to extract out tiles of data from Image Server in ArcGIS 9.3. It worked great for folks who need to grab imagery or quads off of our agency's image service for use on mobile devices. It relied upon the success of the extract by mask tool in Spatial Analyst. In version 10, however, the extract by mask is now taking an extremely long time. In my 9.3 tool, I could extract out a USGS 24K quad in about 2:42 minutes. It now takes upwards of an hour. After spending countless hours trying to get this to work properly in the new version, I am giving up. Has anybody else come across this issue or know a reasonable workaround.