Version: 1.11.0 (using 4.2.00 (KDE 4.2.0), 4.2.0-4.fc10 Fedora) Compiler: gcc OS: Linux (i686) release 2.6.27.12-170.2.5.fc10.i686 I usually select the recepient in the To or CC fields by starting to type the name and then click the desired one from the list of possible completions. This works fine in the normal window focus mode, but after selecting "Focus strictly under mouse" (in SystemSettings Window Behavior), it does not work anymore. As soon as you try to move the mouse over the address, the list disappears.
Thank you for taking the time to file a bug report. KMail2 was released in 2011, and the entire code base went through significant changes. We are currently in the process of porting to Qt5 and KF5. It is unlikely that these bugs are still valid in KMail2. We welcome you to try out KMail 2 with the KDE 4.14 release and give your feedback.