en/upgrading.dbk: make comment about gdm/kdm a proper comment instead of a TODO

en/upgrading.dbk

@@ -235,6 +235,8 @@ fails.
 </para>
 <important>
   <para>
+    <!-- contrary to expectation, gdm/kdm are not safe (status <2008) -->
+
     You should <emphasis>not</emphasis> upgrade using <command>telnet</command>,
     <command>rlogin</command>, <command>rsh</command>, or from an X
     session managed by <command>xdm</command>, <command>gdm</command>
@@ -248,12 +250,6 @@ fails.
   </para>
 </important>
 
-<programlisting condition="fixme">
-TODO: surely gdm/kdm are sane?
-(vorlon) haha, no, gdm is not; I had that thought, and tested a gdm
-         restart on my live session ;)
-</programlisting>
-
 <para arch="armel">
   Users of the watchdog daemon provided by the <systemitem
     role="package">micro-evtd</systemitem> package should stop the daemon and