Created attachment 2303 [details] Screenshot showing the issue The GTK3 version of Claws sets the folder and message lists to have an alternating white and light grey background. My GTK3 theme has white default forground text, meaning that these lists appear for me as white-on-white or white on a light grey with insufficient contrast for legibility. The GTK2 version of Claws does not do this. It's possible that my theme is broken, in which case you can tell me what the CSS selector for these lists is and close this. If you are overriding the GTK3 theme colors, though, you really need to stop doing it, as it's always going to break things for someone.
See the mailing list archive message: https://lists.claws-mail.org/pipermail/users/2022-October/031099.html
(In reply to cmb.solus.eliddell from comment #0) > If you are overriding the GTK3 theme colors, though, > you really need to stop doing it, as it's always going > to break things for someone. For information, Claws Mail is not overriding the theme colours.