The first time, I launch a "side-installation" of Qt Creator, a very convenient "Link with Qt" info bar offers me to link with an SDK, which I of course do.
If I install another snapshot the next day, it is not "linked" but the info bar does not appear anymore. In fact it got suppressed that one first time I used it. From then on, I always have to search it in the Options dialog.
Wouldn't it make sense to not automatically suppress it? The bar only appears if you launch an unlinked Qt Creator, and the "Do Not Show Again" buttons should be fine for explicitly removing it.