Hi Rocael,
Thank you for sent me the files. Patch was generate from HEAD (2004-08-25) and it is on
https://openacs.org/bugtracker/openacs/patch?patch_number=590
I tried this patch against a fresh install from HEAD on postgresql and it works fine. Now I have subscription to the notification appearing on the news page and lars-blogger page.
I'm going to do some tests along this week but i think enhancements made by David works good on head. Of course you or Dave could evaluate it better than I before decide applying it to HEAD.
Thank you very much