KDE includes a setting called focus stealing protection that protects misbehaving X Windows applications from always popping in to focus. This can cause problems with certain applications under CrossOver.
A workaround for this behavior is to either disable focus stealing protection or add an exception for each application under CrossOver that shows this behavior. Directions with an example of Microsoft Word are as follows:
Go to the KDE Control Center > Desktop > Window Specific settings.
Select New and in the window that opens type "Disable focus stealing prevention for WINWORD" into the Description box.
Click on "match whole window class" and add "winword.exe" (without the quotes) in the box to its left.
In the Workarounds tab - click the box for focus stealing prevention and choose "force" and "none" as the two options to its right.