[newbie] Terminal not fully functional

[Peter Ruskin]

I don't know what I've done, but now I get this message using any xterm as 
a user - root's OK.  I can only use the spacebar to page forward in a man 
page.

[20:14 peter@penguin:~]$ man bash                                          
WARNING: terminal is not fully functional  
-  (press RETURN)
BASH(1)                             BASH(1)

On consoles 1..6, as root or user, I get...
[20:14 peter@penguin:~]$ man bash                                          
<standard input>:1386:warning: can't break line                            
BASH(1)                             BASH(1)

Ideas, anyone?
-- 
                         Peter Ruskin, Wrexham, Wales.
        Registered Linux User No. 219434 ( see http://counter.li.org/ )
                Linux Mandrake release 8.0 (Traktopel) for i586
             Linux 2.4.3-20mdk-win4lin-pnr,  KDE: 2.1.2,  Qt: 2.3.1
                           Uptime 8 hours 20 minutes