Hi, I've just sent a message about the nature of my latest (I hope not useless) code. This is a brief statu report: I checked and ported almost all instances of LayoutClass except: - XMonad.Layout.MultiToggle: I never used it, I don't have a clear idea of what is supposed to do so I'm reluctant to touch code I don't know. - XMonad.Layout.PerWorkspace: I've never used and I must confess I don't understand layout combinators very well, so the same of the above..;) But I'm sure Brent can do that in a second. - XMonad.Layout.ToggleLayouts: I didn't have time but I came to read David's code quite well (moreover I've already hacked David's combinators and ported LayoutCombinators), so that's very easy and I'll do that shortly (before pushing anyway). The rest should be just fine. The only incompatibility with old configurations is due to the fact that the type of the tabbed configuration has changed, and tabSize has been removed. "tabbed shrinkTest defaultTConf" is working fine, since TConf is not exported and I wrote the code to convert it into the new configuration. But it will fail in case of record update of defaultTConf, since fields are not exported (they would clash with the new decoration configuration system). The type signature of the function is changed too, but we do not usually invite user to write them down, so this should not be an issue. I tested XMonad.Config.* and they seem to be working just fine. I think this is it. Andrea