Version: CVS (using KDE Devel) Installed from: Compiled sources Open a file with a few lines in it but less than a page full - scrollbar is inactive. Click in the file to make sure it has focus. Now move the mouse scroll wheel. The next tab will be selected and the file contents will switch. I'm not too excited about having the scroll wheel move the tabs. I commonly have the mouse over the debugger buttons on the toolbar and use the scrollwheel to move the source file. Now I have to keep watch and make sure that the mouse doesn't drift down onto the tab bar.
Variation on this bug. Using the scroll wheel over the breakpoint area switches files tabs instead of scrolling the text.
Update kdelibs/kdeui.