In the list of mails in a folder, the delete buttons (small x's) do not always show. This seems to occur especially if one "scrolls out of the list" (e.g. scroll behind the first or last mail). Then also, not all buttons always fade out. It is not 100% reproduceable, but happens more than half of the time. Observed in version 4:4.5~20100820.1165966-1maemo1.1167016.
Still happens in 4:4.5~20100928.1180427-1maemo1.1180334 .
Delete buttons have been removed due to too high accident rates.
Together with the Gray Grouping By Time, makes the GUI look cleaner, too.