> Can anyone please try it with his favourite modifed-arrow-key-using > software with TERM=st and TERM=xterm?
It looks like in joe st behaves exactly like xterm (which is: starting a selction as expected with ctrl, and inserting A, B, C and Ds with shift and alt). In Vim nothing really works regardless of the TERM settings (Vim inserts parts of the control sequences etc.). Haven't tried anything else. I don't use arrow keys if I can avoid them and thus am not very familiar which software supports modifier keys with arrows. -- Eckehard Berns