mc doesn't like underscores in dir name

["Helmut Hullen" <Hullen t-online de>]

Hallo, mc,

I'm working with mc 4.6.1 on some slackware installations (10.x and  
11.0).

As described in <AHpF$zEjSsB helmut hullen de>  
(de.comp.os.unix.linux.misc) I've problems with dir names and file names  
containing underscores under slackware 11.0.

        mkdir -p /tmp/s_t

starting mc, going into /tmp - that's ok
going onto "s_t" and pressing "enter" shows a warning, but mc goes into  
the directory.

        touch a_b

and mc jumps one dir higher ("/tmp") and makes this file in this  
directory.
Editing "a_b": no problem.
Deleting "/tmp/s_t": no problem.

The same steps under slackware 10.x: no problem.

Another guy reports the same problem with openSUSE 10.2 x86_64 and i586  
with mc-4.6.1-63.5.

How can I get a better working mc?

(please excuse my gerlish!)

Viele Gruesse!
Helmut