For example,
_default/WebLeftBar.txt
contains the older form
<div class="twikiLeftBarPersonal" style="margin-top:0;">
<script type="text/javascript">
<!--
writeToggle("+","-","twikiLeftBarPersonalContent")
//-->
</script>%CALC{"$IF($EXACT(%WIKINAME%,TWikiGuest),[[%SCRIPTURL%/viewauth%SCRIPTSUFFIX%/%BASEWEB%/%BASETOPIC%][login]],Hello
[[%WIKIUSERNAME%][$PROPERSPACE(%WIKINAME%)]] <font size=\"-1\">%BR%([[%SCRIPTURL%/viewauth%SCRIPTSUFFIX%/%TWIKIWEB%/LogoutAn
dLogin][not me?]])</font>)"}%
<div id="twikiLeftBarPersonalContent">
%INCLUDE{"%MAINWEB%.%WIKINAME%LeftBar" warn="<a href=\"%SCRIPTURLPATH%/edit%SCRIPTSUFFIX%/%MAINWEB%/%WIKINAME%LeftBar?templa
tetopic=%TWIKIWEB%.WebLeftBarPersonalTemplate&topicparent=%WIKINAME%\">Create personal sidebar</a>"}%
</div>
</div>
rather than the new
%INCLUDE{"%CANLOGIN{then="%TWIKIWEB%.WebLeftBarLogin"}%" warn="off"}%
%INCLUDE{ "%TWIKIWEB%.WebLeftBarWebsList" }%
Possibly there are other changes needed as well.
SVN 6047 has the left bars corrected in _default and Trash webs.
CC