Version:            (using KDE KDE 3.2.0)
Installed from:    Compiled From Sources
Compiler:          gcc version 3.2.2 
OS:          Linux

Selection of a week changes the current month to a different month, if the monday of the selected week is of a different month than the currently selected month.

If the selected week is the last week of a month (and the last week in the date selector) but the monday is not of the following month, the date selector does not switch the current month to the following month.

For better usability the date selector should switch the current month to the following month if the last week contains a day of the following month.