Version: (using KDE Devel) Installed from: Compiled sources Changing the 'Number of Lines' to a lower number with text in the buffer causes strange results. Sometimes the scrollbar is not adjusted correctly. There are empty lines between the visible text and any 'history' text. HistoryScrollBuffer::setMaxNbLines appears the culprit.
Fixed in KDE 3.5.6 (I believe) and 4