[BUG] git gui and my ö

Hello,

when I try to amend a commit with git gui that is properly signed-off by me and hit "Commit", I get

	commit-tree failed:

	<sha1 sum>
	Warning: commit message does not conform to UTF-8.
	You may ...

The commit was done with git-commit, I have 

	zeisberg@cassiopeia:~$ set | grep -E '^L(ANG|C_)'
	LANG=en_US.UTF-8
	LC_CTYPE=en_US.UTF-8

and the ö is properly displayed in the commit message text box before hitting Commit. When I remove the ö, I can commit (and re-amend on the cmdline).

I'm using:

	zeisberg@cassiopeia:~/gsrc/linux-2.6$ git version
	git version 1.5.1.1.190.g74474
	zeisberg@cassiopeia:~/gsrc/linux-2.6$ git gui version
	git-gui version 0.6.5.10.g845d3

I don't know tcl/tk very well, so for now you only get a report and no patch :-(

Best regards Uwe