I have a problem with Vim 7.4 on my laptop installed with Ubuntu 14.04. When I perform any invalid action, I expected that nothing happens, But I always received strange symbols look like quote character appear and replace my text. Or sometimes, in command mode, when I type a command, 'w' or 'b' for example, it isn't jumping forward/back as I expected but the character 'w'/'b' appear until I press ESC that the action perform (with some addition quote chracters replace my text).
Here are two examples:
This problem annoys me a lot, please help me.