Hello!
I've noticed an odd display problem with ghci and vim. The problem occurs with ghci-6.6 and vim-6 on Mac OS X 10.4.9 (Terminal.app and uxrvt in X11.app) and with ghci-6.2.2, ghci-6.6.1 and vim-7.0 on OpenBSD 4.1 (via PuTTY from Windows).
1 - Resize your terminal window to 40 lines. 2 - Start ghci. 3 - :set editor vim 4 - :edit File.hs (pick an existing file)
Vim doesn't display the file contents properly in the bottom half of my terminal window (it doesn't display parts of the file). But it does correctly display the : command line at the bottom of the screen. Do you see a lot of control structures scattering around?
The way you get them when using !vim within vim? (you can still use :q! do quit) your TERMINAL env var might be important. Does it look different when additionally running all within screen? Perhaps :h terminal* can also help? I'm no experienced user with this stuff. It did just work for me all the time :) Marc