Thankyou for taking the time to respond Ben, I've found a workaround, but still find it perplexing.
I only get the problem if my terminal type is xterm, if it's vt100 then it doesn't happen. -- You received this message from the "vim_use" maillist. Do not top-post! Type your reply below the text you are replying to. For more information, visit http://www.vim.org/maillist.php
