Created attachment 103016 [details] If KMail looks like that, you are unable to press any links or buttons in the mail-preview If you choose a scaling-factor (Systemsettings->Hardware->Display & Monitor->scale display) which is not an integer (e.g. 1.4), the UI crashes and gets nearly unusable. I have a 3K-Monitor (2880*1680 pixels).
*** This bug has been marked as a duplicate of bug 372189 ***