Bugs in today's software, as much as we try to eliminate them, are an unfortunate reality. While the ideal goal is to have no bugs, the realistic goal is to have only minor bugs. :)
A new version of BitWise of Mac OS X 10.4 (Tiger) was uploaded last night around 8:30 pm EDT to address a minor, but annoying, bug. The contact list seemed to be experience some sort of adolescent growth spurt; each time you logged in, the contact list would get a tiny bit taller. It wasn't too noticable unless you logged in and out a lot, which is why it wasn't found during testing.
At least as far as bugs go, this one was harmless and relatively amusing. :) If you're going to have bugs, those are the kind to have!