[Lynne]

When you do an upgrade, if your templates were not touched (edited), then they will get upgraded by the vbulletin script. It you had touched them (they were listed in red - you had edited tehm at some point), the vbulletin upgrade script will not upgrade them and you will get a notice on the front of your admin cp saying "There are currently X templates out-of-date that need to be upgraded or reverted" (or something like that). If you open one of those out-of-date templates to edit, you may hit View History > Compare and see the differences between that out-of-date template and the default Jelsoft one.