show-all-if-ambiguous and show-all-if-unmodified in ~/.input breaks characters a and u

Binary package hint: bash

If I set 'show-all-if-ambiguous' to either 'on' or 'off' in my ~/.inputrc , I can't type 'a' on the bash command line anymore. And if try to paste a string with 'a':s in it, the string appear without the 'a':s. Other characters are not affected (not even 'A').

In a similar manner, setting 'show-all-if-unmodified' to either 'on' or 'off', makes it impossible to type 'u'.

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: bash 4.1-2ubuntu4
ProcVersionSignature: Ubuntu 2.6.35-25.44-generic 2.6.35.10
Uname: Linux 2.6.35-25-generic x86_64
Architecture: amd64
Date: Sat Feb 12 03:41:11 2011
InstallationMedia: Xubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101008.1)
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.utf8
 SHELL=/bin/bash
SourcePackage: bash