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[Kelly Doran <861268@xxxxxxxxxxxxxxxxxx>]

I have also been having this bug.  I have tried quite a few things to
narrow it down but I could not find anything too definitive.

Basically, to reproduce it, I just go into a big php file and search for
a string that will cause vim to jump around the file a lot.  Every once
in a while, when it should be redrawing the screen (I think...) is when
this bug occurs and there will be text corruption.  I have reproduced
this in both xterm and gnome-terminal, so I don't think it is a problem
with any specific terminal.

Also, the actual corruption that occurs is different with each terminal.
In gnome-terminal it will just show the same text as before the search
jumped around the file, but the cursor and half the character after it
will be changed to what should be displayed.  Moving the cursor up and
down will fix stuff line by line.  Xterm on the other hand will jump to
the correct location and redraw most of the screen, however chunks of
text will simply be completely missing (see attachment).

I did a few tests with xterm to try to further pin down what was causing
it to fail and I think the main problem was the font.  I tried using the
default xterm font and color scheme and everything seemed to work fine.
After changing the color scheme to the gnome-terminal scheme that ships
with ubuntu, it was also running fine.  However once I changed the font
to Ubuntu Mono, size 13, the text corruption started.  So either I was
just getting really lucky or the errors were extremely rare using the
normal font, or the change in font is somehow related to this bug.

And finally, I am able to completely get rid of this bug by switching
from unity to unity 2d.  I am using 11.10 with pretty much all default
settings and the default nvidia driver.  Hope this helps, please let me
know if you guys need any more info!

** Attachment added: "Text corruption in vim, xterm"
   https://bugs.launchpad.net/ubuntu/+bug/861268/+attachment/2638762/+files/Screenshot%20at%202011-12-18%2016%3A48%3A08.png

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https://bugs.launchpad.net/bugs/861268

Title:
  text corruption in terminals (xterm, urxvt) and emacs

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