Currently extension tested on these Magento versions: CE 1.4.2, 1.5.1, 1.6.0
Currently this extension is in beta version, don't install it directly on live website without checking its stability on semilive/prelive/dev version
If you install extension on one db but then transfer db to anohter instance, it is possible that you forget to include stored porcedures with your dump. The fix can be done by performing the following action:
ecomdev_urlrewrite_*
tablescore_resource
with code ecomdev_urlrewrite_setup