I telnet (IBM PERSONAL COMMUNICATIONS) into several different AIX servers from my laptop with Windows 2000. On one of the servers vi has started editing bizarrely. For example, I will use 'i' or 'o' to start inserting text and it will suddenly start copying the line above overlaying what was there. Scrolling down inserts blank lines that don't appear when the file is saved and reopened. I can put my cursor on a line to edit, but when I save and reopen the file find that I edited an entirely different line. and so on. $TERM is VT220, same as for all my server sessions. None of the others sessions have this problem. I have compared options, .profiles, key mappings and can't find anything different that should affect this. Any suggestions?