#345 rdesktop becomes unresponsive until it is killed or quit

I am using the rdesktop 1.6 version. Ubuntu 10.14 LTS on ARM.
I found that rdesktop quit after more than 16 minutes when my remote desktop pc was disconnected since network was down.
And rdesktop becomes unresponsive until rdesktop is killed or quit itself after 16 minutes.
And then printed out:
ERROR: recv: No route to host
OR
ERROR: recv: Connection timed out.

Could some one do me a favor?
Thanks so much in advance!