The Grumpy Editor's guide to terminal emulators

The Grumpy Editor's guide to terminal emulators

Konsole and gnome-terminal both do.

You'll have to either play with your character set controls, or switch to UTF-8. Frankly, these days the latter action is actually simpler and works better: you can copy+paste a block of line drawing characters without having them end up as gibberish if both sides are UTF-8 aware.