Font bottm line artifact after middle of screen

[Shahbaz Youssefi]

I'm using Ubuntu 12.10 (updated to current date of writing this report) under 1440x900 resolution. I have indicator-appmenu removed, so in my maximized terminal I see the menus below the main bar on the top.

I use the font "Ubuntu Mono" with size 12, other parameters set to default. The cursor shape is Block.

The bug is that the last line of the terminal seems to be just a little too low, somehow printing characters below a defined window or something. The symptom of the bug is that in a maximized terminal, once the cursor passes the middle column, it will leave artifacts behind on the last line (one pixel width?) which doesn't get cleared up.

I cannot take a screenshot of this, because any refresh of the screen (such as minimize and back, or the flash from Ubuntu's screenshot program) makes the artifacts go away. However, I took a snapshot with a camera and attached the image.

If I have a different terminal window size, such as when indicator-appmenu is installed (so there is some more height available for the terminal), this does not happen. Neither does it happen in an unmaximized window. The reason being that unmaximized windows make the height a multiple of the line height gnome-terminal likes, and in the case of other window sizes because the calculated "last line" of the terminal is luckily placed a bit higher than the bottom edge.

My suspicion is that when calculating how many lines fit in the given height of the terminal, there is an off-by-one-pixel error.

Additional information:

$ lsb_release -rd:
Description: Ubuntu 12.04.2 LTS
Release: 12.04

$ apt-cache policy gnome-terminal
gnome-terminal:
  Installed: 3.4.1.1-0ubuntu1
  Candidate: 3.4.1.1-0ubuntu1
  Version table:
 *** 3.4.1.1-0ubuntu1 0
        500 http://it.archive.ubuntu.com/ubuntu/ precise/main i386 Packages
        100 /var/lib/dpkg/status

[Shahbaz Youssefi (shabbyx)]

This issue doesn't exist in 14.04.