This is likely fixed in 4.2.1-2 in Utopic. At least I can't reproduce it anymore on Debian Testing with 4.2.1-2. It's likely that this had been fixed upstream with either 4.2.0 or 4.2.1.
** Changed in: screen (Ubuntu) Status: New => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1380164 Title: screen crashed when trying to split via terminal control sequence To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/screen/+bug/1380164/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs