Description of problem:
scrolling, either with the mouse/roll or keys fails to move some of the lines
near the bottom of a vertically maximized konsole window

Version-Release number of selected component (if applicable):
kdebase-4.1.0-1.fc9.1.i386

How reproducible:
always, both on my desktop machine and in a virtual machine

Steps to Reproduce:
1.launch konsole and maximize vertically
2.cat some largish file
3.scroll
  
Actual results:
some lines near the bottom stay fixed

Expected results:
all lines should move

Additional info:
number of fixed lines varies when scrolling forward or backward.
number of fixed lines seems to depend on the vertical size of the window