Sorry, I meant to save one of the messages in this thread so I could reply with the proper message ID, but I accidentally deleted them all. And the web-based archive doesn't report message IDs.
I cannot reproduce the reported problem on Debian 6. All looks normal for me. arc1:/var/tmp/bash-4.4-beta# cat /etc/debian_version 6.0.10 arc1:/var/tmp/bash-4.4-beta# uname -a Linux arc1 2.6.28-1-amd64 #1 SMP Wed Feb 18 17:16:12 UTC 2009 x86_64 GNU/Linux arc1:/var/tmp/bash-4.4-beta# ./bash arc1:/var/tmp/bash-4.4-beta# cat ^Z [1]+ Stopped cat arc1:/var/tmp/bash-4.4-beta# fg cat ^C arc1:/var/tmp/bash-4.4-beta# echo "$BASH_VERSION" 4.4.0(1)-beta