Version:           1.2.3 (using KDE KDE 3.1.5)
Installed from:    Debian testing/unstable Packages

Using konsole with font setting "Normal" (which presumably uses the font that comes with konsole?) some letters are too wide and don't display properly. I have noticed this for the letters D, m and @. They will overlap with the next letter, and sometimes the overlap will be blanked. Both these effects can be seen on the following screenshot: 

  http://math-www.uni-paderborn.de/~axel/konsole.png

Note how the last vertical line of the upper m is not visible, but in the output of echo, it is visible. (After selecting all text, the missing line becomes visible again.) Note also how the last line of the first m and the first line of the second m overlap.