This Is What Happens When You Let Developers Create UI

If you let your developers create your UI, hilarity ensues.

Atwood, Jeff. Coding Horror (2006). Design>User Interface>Usability>User Centered Design

Coding Horror: A Modest Proposal for the Copy and Paste School of Code Reuse

If you use copy and paste while you're coding, you're probably committing a design error. Instead of copying code, move it into its own routine. Future modifications will be easier because you will need to modify the code in only one location.

Atwood, Jeff. Coding Horror (2009). Articles>Content Management>Programming

Treating User Myopia

Fortunately, you don't see dialogs in web apps much, but this sort of modal dialog lunacy is, sadly, becoming more popular in today's AJAX-y world of web 2.5. Those who can't learn from history are doomed to repeat it, I guess.

Atwood, Jeff. Coding Horror (2009). Articles>Web Design>User Interface>Usability

Teaching Users to Read

This may sound a little harsh, but you'll see, when you do usability tests, that there are quite a few users who simply do not read words that you put on the screen. If you pop up an error box of any sort, they simply will not read it.

Atwood, Jeff. Coding Horror (2004). Articles>User Interface>User Centered Design>Usability