Last token dev releases have added a new [node-url] token, this creates a conflict wit this module that defines too the same token, forcing a conflict error with other modules as pathauto. Here is a patch as explained in this issue
Dave Reid - August 12, 2010 - 22:20
To apply the patch download the patch file above to the directory
run the command
patch < 845250-notifications-token-dupe-D6-2.patch
Works great, Thanks Dave!