Today I was working with some collegues on some xsl within SharePoint, and we wanted to know where the following template came from:
<xsl:apply-template select="." mode="RenderView">
After some digging through the xsl templates in the SharePoint root, we found %SharePointRoot%\TEMPLATE\LAYOUTS\XSL\Internal.xsl, which contained the template "Hack-Hack-Hack"
xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<!-- This is a hack ensuring that XSLT runtime tables are changed incrementally. -->
I am not sure whether or not this should have made it to the release of SharePoint 2010 ;)