While moving the cursor across a vim process open in a tmux session, every now and then, why does it leave a trail of ghost characters - ^[OB, ^[OA?

Question

These disappear if I do a page-up and page-down. Why does this happen and how do I rectify it?

http://i.stack.imgur.com/DnMYl.png

I recently fiddled around with

Answer 1

^[OB and ^[OA are how your terminal represent and .

I've seen these (and their friends ^[OC and ^[OD) appear in the "command line" or omni-completion menus and during usage of a couple of plugins in vim in tmux.

My solution was to map them to the directional keys:

map ^[OA 
map ^[OB 
map ^[OC 
map ^[OD 

In case you don't know, you must not type ^[ as two characters, you must do .

That is, while in --INSERT-- mode press the Control key and the V key together then hit the Escape key. Doing so will input the correct single character that looks like ^[.