@KaKi87, it is indeed. It’s Bugzilla-specific syntax - to a Markdown author, it doesn’t make much sense. However, it does disable word wrap, so it functions like a <pre>.
Unfortunately, it’s not even converted into semantic HTML:
test 1
> block
test 2
…becomes:
<pre id="comment_preview_text" class="bz_comment_text">test 1 <span class="quote">> block</span> test 2</pre>
…instead of the expected:
<P>test 1</P>
<blockQuote><P>block</P></blockQuote>
<P>test 2</P>
…(or whatever actually is correct - I’m not a brilliant web developer).
It might be caused by the old Bugzilla version that KDE is running, since Harmony isn’t ready yet for production systems. Perhaps test whether Log in to Bugzilla does it correctly.
Luckily, in Mozilla’s bugzilla instance, which Harmony should be catching up with (because they develop it, to my knowledge) Markdown is supported.