vim replaces lines when I move to a new line

I'm using Terminal.app on Mac 10.6.6 and want to upgrade vim. Should I install it in /usr/local?

I'm asking because my native vim install is messed up for some reason. Sometimes, when I open it and move up and down, the whole line changes to another line on the screen, like dancing chairs. But if I type :q it quits fine because nothing 开发者_运维技巧actually gets changed (cause I'm just moving the cursor around), but I can't see what I'm doing because when I move to a new line, that line gets replaced with another line about 6 lines below, but it's random.

$TERM = xterm-color

I installed Mercurial & ack via CPAN (for which I installed File:Next) yesterday, so maybe that did it. I have MacVim, but I want vim to work too cause I use it for Git, etc.

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Try running vim -u "NONE" to load your Vim without your .vimrc, this might be the culprit in this case. If everything works like it should you can try re-enabling things one by one so you can see what caused it.

If you want to update your Vim I can recommend homebrew which has a so called formula with a regularly updated Vim.

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Put the mvim script that came with MacVim in your $PATH and use it on the terminal with the -v option or a symbolic link named vim.

Also, use TERM=dtterm for Terminal.app. Programs will behave better.