All the UI stuff mentioned here is true and still to this day. None of it ever got fixed.
So when people say they held off for awhile before playing Borderlands and didn't have issues...you just didn't notice them.
The only thing I think that did get fixed was multiplayer port issue. UI weirdness never got touched, and the mic problems were never fixed either. Friends and I all just disabled the in-game voice in the config files and used Steam voice instead.
Batman, hit me up one of these days and we'll start up a game and I'll show you the UI menu's that are not consistent with the rest.
One of my favorites is the mouse wheel not working on the Friends list when trying to invite someone.