Just a reminder to anyone who "copies" toolbox components into their job/project directories.
If you previously uncheck the option for "Make this folder the default search location for Toolbox components", you may have to uncheck it again after updating to SP4.0.
I just loaded SP4.0 and forgot to make this change. SW once again relink all of you toolbox components back to file in the toolbox instead of the parts in the current project directory.
This is a know issue (SPR 596489). If this affects you, contact your VAR to be put on the notification list for the SPR. This might help it get fixed sooner.