I came across this simple way of hiding twisties
on the web the other day so I thought I would
share it here.
Basically in your web page that has your view
insert the following style information:
<style type="text/css">
table a img {
display: none;
}
</style>
This means is any image contained within a
<table> tag and surrounded by an anchor
<a> will not be displayed. The only downside
to it is that any other image links used in
the view will also be hidden but then there
are very simple workarounds to counter that.