byobu broken on natty

Binary package hint: byobu

byobu seems broken on natty in 2 scenarios for me:

a.) upgraded system
b.) fresh install on ec2 where byobu-launcher-install' has run

running 'byobu' fails with no output.

$ strace -o out -ff byobu

of the four out.* files, the one that showed most info ended with:
open("/usr/share/locale-langpack/en.utf8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/share/locale-langpack/en/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
write(2, ": No such file or directory", 27) = 27
write(2, "\n", 1) = 1
lstat("/home/smoser/.byobu/.", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
lstat("/home/smoser/.local/share/byobu/.", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
rename("/home/smoser/.byobu/.", "/home/smoser/.local/share/byobu/.") = -1 EBUSY (Device or resource busy)
write(2, "mv: ", 4) = 4
write(2, "cannot move `/home/smoser/.byobu"..., 74) = 74
write(2, ": Device or resource busy", 25) = 25
write(2, "\n", 1) = 1
lstat("/home/smoser/.byobu/..", {st_mode=S_IFDIR|0700, st_size=36864, ...}) = 0
lstat("/home/smoser/.local/share/byobu/..", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
rename("/home/smoser/.byobu/..", "/home/smoser/.local/share/byobu/..") = -1 EBUSY (Device or resource busy)
write(2, "mv: ", 4) = 4
write(2, "cannot move `/home/smoser/.byobu"..., 76) = 76
write(2, ": Device or resource busy", 25) = 25
write(2, "\n", 1) = 1
close(0) = 0
close(1) = 0
close(2) = 0
exit_group(1) = ?

Screen works fine.
moving .byobu to .byobu.tmp resolves the issue.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: byobu 3.9-0ubuntu1
ProcVersionSignature: User Name 2.6.35-22.35-virtual 2.6.35.4
Uname: Linux 2.6.35-22-virtual i686
Architecture: i386
Date: Wed Nov 17 16:45:34 2010
Ec2AMI: ami-2c28df45
Ec2AMIManifest: (unknown)
Ec2AvailabilityZone: us-east-1b
Ec2InstanceType: m1.small
Ec2Kernel: aki-407d9529
Ec2Ramdisk: unavailable
PackageArchitecture: all
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: byobu