The guildline has been improved, and should be working. The detach button has returned and there is the addition of the clickable smilies. Click the smilie in the lower right corner to bring up the smilie board. (You can also turn this back off by clicking it again.)

Improvements:
You can still talk on your regular guildline and also there is now a common chat line so you can chat with players on other guilds. You will be able to view both lines.

The Letters next to your name will indicate which line you are talking on.

[R] rider
[E] equilibrium
[M] manufacturer
[C] chat

To type on your regular guildline you will select the Guild radio button. To type on the chat line select the Chat radio button.

You can also send private messages. To do this you will select the Tell radio button and type the player's name.
sent messages [>>]
received messages [<<]