The spellchecker (ispell, aspell, pspell) usually comes up with a list of alternatives, and the top one is often the right one.
In 1.2 (xfroms), the first alternative was suggested for replacement so I could keep hitting "replace". In 1.3.0 (qt) The wrongly spelled word is the suggestion instead, and that don't seem useful to me. I have to double-click the correct word even if it is the top one, and double-clicking is more work than a single-click. The old behaviour were better. Even better would be an ability to select replacement & advance to the next wrong word by single-clicking a word in the suggestion list. Single-click replacement not only for the first, but for any alternative. That may be contrary to normal use of that sort of widget, solvable by displaying a column of buttons instead. Helge Hafting