Thanks to the host of the UsabilityBlog Paul Sherman for letting me do that guest post!
A copy of the post is archived below. If you want to make comments about the post, you can do them at the UsabilityBlog.
Wrong Assumptions, Sony Ericsson PC Suite
Every time I connected my Sony Ericsson phone to my Windows PC, I got reminded of an annoying feature of Sony Ericssons PC Suite: The time checker, that checks if the time of the cell phone is the same as the time of the PC (see picture below).
Every time it popped up and asked me, if I wanted to change the time of my cell phone. The program assumed, that the time of the PC was always correct, but the opposite was the case: The cell phone time was correct, but the time of Windows was wrong. So I always had to select "No". The funny thing is: "Yes" had the addition "Every time I connect. Do not show this message again", but "No" didn't have such a checkbox.
Only about 30 seconds difference, but PC Suite sees immediate need for action...
What to learn from this mistake
Make the right assumptions. Here it was assumed that the time of Windows is always correct, which may not always be the case.
Give the user the possibility to disable an unwanted feature. Especially if it is an annoying pop-up window
Note: The current Version of PC Suite is Version 3. This discussed time-checker-feature was implemented until Version 2. Nevertheless, it's a good example for bad usability.