RSS feed doesn't filter personal labels

The labels field in RSS feeds doesn't properly filter out personal labels (i.e. my:favourite)

e.g.

<entry>
<title>Atlassian Delicious Feed (updated)</title>
<link rel="alternate" href="http://extranet.atlassian.com/display/DEV/Atlassian+Delicious+Feed" />
<category term="atlassian-culture" />
<category term="favourite" />
<category term="delicious" />
<category term="rss" />
<category term="favourite" />
<category term="favourite" />
<category term="favourite" />
<category term="favourite" />
<category term="favourite" />
<category term="favourite" />
<category term="favourite" />
<category term="favourite" />
<category term="favourite" />
<category term="favourite" />
<author>
<name>Charles Miller</name>
</author>
...