You guys should really follow audentio's advice and setup your styles to something like this:
View attachment 73010
It'll really make your upgrade process easier. I made tons of template edits in UI.X Edit. For this update, all I need to do is to import the XML and overwrite the original UI.X. Styles from UI.X Edit and below aren't touched and I can then use the Outdated Templates function and check for template changes from the new update. Yes it'll make your admin area filled with non active styles, but easy upgrade process is worth it.