There is a parallel piece of "frameset" code in
whskin_homepage.htm, with the same number of rows as in the launch
page.
I'm not sure whether or when this gets invoked.
Maybe you've already done the following, but it's worth
mentioning in case you haven't:
In whstart.js, near the beginning, look for this line:
var gsToolbarOrder = "custom7279|toc|blankblock|banner";
Even if you don't have any buttons, you might see the banner
button that you thought you had deleted.
And in whskin_tbars.htm, near the end, look for these lines:
addButton("toc",BTN_TEXT|BTN_IMG,"Contents","","","","",0,0,"","","","","","");
addButton("fts",BTN_TEXT|BTN_IMG,"Search","","","","",0,0,"","","","","","");
addButton("searchform",BTN_TEXT,"","","","","",0,0,"","","","","","");
addButton("banner",BTN_IMG,"","","","","",0,0,"","","","","","");
addButton("blankblock");
writeStyle(false);
ReSortToolbarButtons();
writeToolBar();
Again, that pesky banner button creeps in.
Harvey