In Designer 8.5, if I change the width of a column in a design list (e.g. the list of forms in a single database), then close and reopen the design list, the column widths have reverted to the default.
This is effectively a regression bug, since the ability for Designer to remember these column widths was added in Notes 7.
It’s also rather annoying as the Alias and Last Modified columns are too narrow by default (and the width of the Name column is borderline).