This was discussed recently on either the trac-hacks mailing list or trac-users.
Tickets in the RSS feed have subjects such as:
Ticket #6074 (enhancement updated): Add way to exclude sets of pages
It would be much more efficient if I could review the RSS feed each day for components that were of interest to me by looking at just the subject lines. I could then even setup filters to extract what is relevant to me. This would be accomplished by a subject line such as:
Ticket #6074: ListOfWikiPagesMacro: (enhancement updated): Add way to exclude sets of pages
or
ListOfWikiPagesMacro: Ticket #6074: (enhancement updated): Add way to exclude sets of pages
(I arbitrarily chose the ticket to use for this example.)
See also #1151.