Toolbars - status bars - estimated copy time - and beyond.
Trust me, if you're writing an installation program, you want to pay particular attention to the status bar and the time remaining to finish the setup.
For example, to copy roughly 15GB to an external USB 2.0 hard drive - that has about 300GB of free space - the following status bar is not a little disconcerting:
I'll be the first to admit - Vista rocks! and it really does.
But 125 years to finish copying 15GB? Dude, I honestly believe there are better things to do :)
In all, it actually took almost 3 hours to complete this backup. Don't ask me why it was estimating 125+ years initially.
But for those who have NOT seen this - I thought you'd get a real kick out of it.