Just to give you an update, I added all these and many other QT 4.x specific #defines to our standard pre-processing packages that come with SlickEdit. They will ship with the next product update.
As for debugging tagging issues, the best thing to do is to go to the file where you expect the symbol to be declared or defined and compare the source code to what you see in the Defs tool window, and keep your eyes open for things that don't match and things that look like pre-processing garbage.