The answer? Change wikisearch.pm:

$head =~ s/%SEARCH[^%]*%/ /go;  # remove inline search
$head =~ s/%DRAWING({.*})?%/ /go; # AAW: Remove drawing tags
$head =~ s/\n/ /go;

-- AlWilliams - 30 Sep 2000

This is already in TWikiAlphaRelease since 20 Sep 2000, but thanks for letting us know. The rendering of a topic summary has been moved to wiki.pm, function makeTopicSummary. It does the following filtering:

	 $htext =~ s/%INCLUDE[^%]*%/ /go; # remove server side includes
	 $htext =~ s/%SEARCH[^%]*%/ /go;  # remove inline search
	 $htext =~ s/%DRAWING[^%]*%/ /go; # remove TWikiDraw drawing
	 $htext =~ s/%ATTACH[A-Z_0-9]*%//go;
	 $htext =~ s/%PUB[A-Z_0-9]*%//go;
	 $htext =~ s/%SCRIPT[A-Z_0-9]*%//go;
	 $htext = handleCommonTags( $htext, $theTopic, $theWeb );
	 $htext =~ s/<[^>]*>//go;			# remove all HTML tags
	 $htext =~ s/[\[\]\*\|=_]/ /go;	# remove Wiki formatting chars
	 $htext =~ s/\s+[\+\-]*/ /go;	  # remove newlines and special chars

-- PeterThoeny - 30 Sep 2000