My Blogger publish ping and categorizer script was rid by a rather silly bug, in assuming that you had both the Blogger Settings -> Formatting options "Show Title field" and "Show Link Field" turned on, when trying to inject the extra "Tags" field on the edit post page. Now it no longer assumes either is on, and does a much better job of adapting to the circumstances that be; it should work with either combination of settings. Present (and future) users are recommended to reinstall the script, from the original location.
There are still some outstanding known bugs and missing features, but this at least addresses the most annoying one of them.