Undefined index: debugTrackVisitsInsidePiwikUI #900

Hi, great product you have developed here. I'm using it on an organisation's intranet which is running on IIS. piwik is running on windows 2003 WAMP server.
I am getting the error below however, everything seems to be running. I'm upload a back trace file too.

Notice: Undefined index: debugTrackVisitsInsidePiwikUI in C:\wamp\www\piwik\tmp\templates_c\%%1D^1D5^1D598A14%%piwik_tag.tpl.php on line 3

Regards
ggreaves

Attachment:
piwik_bug.txt

already fixed in svn; thanks