Single tag in commit comment still breaks timeline.rss xml feed; note that in this ticket addendum I wrote the html encoded list tag using "&" "lt" ";" otherwise when reading the ticket it is misleading.  I cannot expect my users to html encode their comments (myself included).

I committed my project with comment

"... and fixed the misplaced &lt;li&gt; from previous checkin"

and have RSS reader error

XML Parser: Could not parse document:
Entity: line 10:
parser
error :

Opening and ending tag mismatch: li line 10 and title

      <title>... and fixed the misplaced &lt;li&gt; from previous checkin</title>

Entity: line 12:

If I remembered C well enough (I don't) I would dig in to the code.