I also have the same issue, Alpha 6 installed.
SCIM not installed (never used it before)
Interestingly, the correct Thai characters (above and below the lines) show correctly when I type in urxvt and vim (console) but not in any GUI, particularly not Firefox, OpenOffice or gvim (GUI version of vim).
I use Awesome for my window manager and have installed as little as possible. Still it used to work prior to Intrepid.
I also have the same issue, Alpha 6 installed.
SCIM not installed (never used it before)
Interestingly, the correct Thai characters (above and below the lines) show correctly when I type in urxvt and vim (console) but not in any GUI, particularly not Firefox, OpenOffice or gvim (GUI version of vim).
I use Awesome for my window manager and have installed as little as possible. Still it used to work prior to Intrepid.
my /etc/default/ console- setup has the following:
XKBMODEL="evdev" "us,th, lhu" "grp:menu_ toggle, lv3:ralt_ switch, grp_led: scroll"
XKBLAYOUT=
XKBVARIANT=",tis"
XKBOPTIONS=
('lhu' is my own keyboard creation but it doesn't work either way, included or not)