IBus crashes when typing chinese

[Daniel Lee]

Binary package hint: ibus-m17n

If I choose input method "py" I can type the character 谁(shéi) with no problem (but it doesn't give me the option of typing 誰).
If I choose input methods "py-b5" (to force the traditional form) or input method "py-bg" (to force the simplified form) then it will always crash.
Typing the character with the alternate pinyin (shuí) does not cause a crash.
I have not yet found another character that produces the same behaviour.

ProblemType: Crash
Architecture: i386
AssertionMessage: IBUS:ERROR:ibuslookuptable.c:377:ibus_lookup_table_set_cursor_pos: assertion failed: (cursor_pos < table->candidates->len)
CrashCounter: 1
Date: Fri Sep 11 13:16:40 2009
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/lib/ibus-m17n/ibus-engine-m17n
Package: ibus-m17n 1.2.0.20090617-1
ProcCmdline: /usr/lib/ibus-m17n/ibus-engine-m17n --ibus
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-10.32-generic
Signal: 6
SourcePackage: ibus-m17n
StacktraceTop:
 __kernel_vsyscall ()
 raise () from /lib/tls/i686/cmov/libc.so.6
 abort () from /lib/tls/i686/cmov/libc.so.6
 g_assertion_message () from /usr/lib/libglib-2.0.so.0
 g_assertion_message_expr () from /usr/lib/libglib-2.0.so.0
Title: ibus-engine-m17n assert failure: IBUS:ERROR:ibuslookuptable.c:377:ibus_lookup_table_set_cursor_pos: assertion failed: (cursor_pos < table->candidates->len)
Uname: Linux 2.6.31-10-generic i686
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

StacktraceTop:__kernel_vsyscall ()
*__GI_raise (sig=6)
*__GI_abort () at abort.c:92
IA__g_assertion_message (domain=0xfdec05 "IBUS",
IA__g_assertion_message_expr (domain=0xfdec05 "IBUS",