remote machines can't open my display since woody upgrade...

[Martin Edward John Waller <martin.waller@flomerics.co.uk>]

Hello,

Since I've upgraded to woody  and XFree 4.1, I
can't get remote machines to display on my machine
anymore.  Despite that, I can get logins by using
Xnest -query on displays other than :0.

Here's what I do on local:
xhost +   (yeah, insecure blah, just for tesing
you see)
telnet remote

(on remote)
setenv DISPLAY local:0

xterm & (or any X app.)

Error: Can't open display: local:0


This used to work just fine on potato with XFree
3.3.6.

Is there something I've forgotten to config
somewhere?

*confused*


Martin