This is normal behavior, and not something to be concerned about. I don't know exactly what this "housekeeping" involves, but I presume it's a matter of deleting temporary files or the like. I wonder if there are other processes active on your computer that are slowing things down just enough so that what BW formerly did so quickly that there wasn't time to display the message now takes a second or two, long enough to display the message so you'll know (more or less) what's going on.
David Rensberger
Atlanta, Georgia