[debian] ssh hangs

[arne anka]

a long time ago i used to experience frequent hangs with ssh connections,  
when using that infamous dropbear.
after i while i got fed up and replaced that crippled thing with a full  
good sshd, which worked well until a few weeks ago.

but with an upgrade of sshd a few weeks ago the exact same issue was  
introduced again, after a few lines of output the ssh shell freezes and  
there's nothing to be done excpet killing -- and that's not that easy  
since i usually have several connections open and there's no easy way to  
determine which one is the frozen one.

so, 1.5 questions:
- what happens? i never found any log entries shedding light. does anyone  
else experience that?
- is there a way to make ssh connections easily distinguishable with ps or  
so?