Remmina sometimes does not show an established SSH connection

Using Remmina, I have established a SSH connection:
'~$ lsof -i; remmina 5835 detlef 16u IPv4 255905 0t0 TCP noname:39931->T43:ssh (ESTABLISHED)'.
A new window opened titled T43-SSH. But it does not show the T43 prompt. The main pane is empty (black).
Sometimes the same command will produce the remote prompt too. I do not know why there is sometimes the prompt missing.

I expect that Remmina will always show the remote prompt after I have established a SSH connection using Remmina.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: remmina 1.0.0-1ubuntu6.1
ProcVersionSignature: Ubuntu 3.2.0-27.43-generic 3.2.21
Uname: Linux 3.2.0-27-generic x86_64
ApportVersion: 2.0.1-0ubuntu11
Architecture: amd64
Date: Wed Aug 1 19:46:46 2012
InstallationMedia: Ubuntu-Server 11.04 "Natty Narwhal" - Release amd64 (20110426)
SourcePackage: remmina
UpgradeStatus: Upgraded to precise on 2012-05-15 (78 days ago)