There IS a way to do it, but it's a roundabout way. You need to save your homescreen settings, install the ADW Launcher (so you have SOME kind of home launcher), then use root explorer to go into system/apps and delete the launcherpro.apk. Then reboot the phone and download LauncherPro's updated version from the market. Restore settings and widgets and you're in business. I'm not sure the update is worth the trouble, IMHO.
With the YouTube update you can uninstall YouTube in Titanium Backup, reboot and reinstall from the market.
I'm hoping that BD will fix this issue in his update.