xterm doesn't recognize CSI

Hi all,

I try to use my xterm from SUSE 11.1 as vt100/200 emulator, but it doesn’t seem to recognize CSI (0x9b) when utf8 is enabled. CSI works when I disable utf8 with “xterm +u8”, but then other things (like switching to line drawing) don’t work.

Has anybody an idea what might be going on?