abbrev-mode and c-mode bug

[sunway]

emacs version: GNU Emacs 23.0.60.3 (i686-pc-linux-gnu, GTK+ Version 2.8.20) of 
2008-03-03

I have set "inc" as  the global  abbreviation of "#include", when i input "inc"
and press space in other mode like #scratch buffer, it is expanded to "#include"
correctly, but when i input "inc" in c-mode, for the first time it is expanded
to "#includeinc", and the "Message" buffer says "c-after-change: End of buffer"
if i input "inc" for the second time, it is expanded to "#include" correctly.

i have tried "emacs -q", it didn't help.

-- 
sunway

"Do what you say,say what you do"