screen only supports 16-bit Unicode, the Basic Multilingual Plane. Unicode is actually a 21-bit character set and although there's not many characters in the hi

screen only supports 16-bit Unicode, the Basic Multilingual Plane. Unicode is actually a 21-bit character set and although there's not many characters in the higher ("astral") planes yet, there's more added with each new revision. I believe the major feature of tmux over screen is that it allows arbitrary layout of panes per window, rather than just horizontal divisions, although personally I switched because I'm just that nerdy about Unicode. tmux was written by a guy who was very familiar with screen (in fact, it was written inside screen) and while there's no incredibly major differences, I think there's a number of small annoyances that have been filed off.