[dwm] xterm forgets its contents upon resize

Hi there...

Not strictly a dwm question but it's hit me for the first time in the
context of using dwm, and it's _kinda_ putting me off dwm, so I
wondered if anyone else has been bugged by this and/or knows a way
round it:

Suppose I have three xterms open, in an arrangement such as:

+---------+-----+
| | |
| | B |
| | |
| A +-----+
| | |
| | C |
| | |
+---------+-----+

Suppose A contains a whole load of text - maybe I've just cat'd a big
text file, or something. Now, if I swap A and B, then restore A, the
result is that A has "forgotten" or lost most of its textual content -
it's mostly blank. It appears that this happens when it shrinks, and
the restore is not enough to cause it to redraw nicely.

Is this just a "feature" of the xterm I'm using (X.Org 6.9.0(213)
xterm under FreeBSD)? Is there something I can do to stop this
happening? Other clients handle this much better (for example emacs,
or even a shell inside an "emacs -nw" inside an xterm!). At the
moment it's putting me off dwm a bit, though I don't really think it'
dwm's fault... :-[)

I hope my explanation makes sense (I can make screenshots if you
like), and that this isn't a too stupid question. I couldn't see
anything about it in the xterm faq or man page...

Best regards,

-Andy

-- 
Andy Gimblett
Computer Science Department
University of Wales Swansea
http://www.cs.swan.ac.uk/~csandy/