Version:           4.0.0 (using KDE 4.5.1) 
OS:                Linux

When the tab width is changed (in the configuredialog) and the change is applied (by pressing Apply and keeping the dialog open), the change does not take effect.

Reproducible: Always

Steps to Reproduce:
1. Start Konsole.
2. Create a directory and cd into it.
3. Create the empty file empty.cc
4. Create the file prov.cc with some content like this:
float calculate_something(float const a, float const b, float const c) {
   return
      calculate_something(1.7, calculate_something(8.9, 19.51, 33.0), a) +
      calculate_something(c, 18.8, calculate_something(7.5, b, a));
}
5. Execute "diff -u empty.cc prov.cc|kompare -".
6. Open the settings dialog and change the tab width to 8 (or 4 if it was 8 before).
7. Press Apply.

Actual Results:  
Nothing changes (not even when forcing a redraw by switching to another program and switching back to Kompare).

Expected Results:  
The change of tab width is applied.

The change is applied if the configuredialog is closed (Ok or Cancel). It is also applied if the font is changed and Apply is pressed afterwards.