Version: 1.11.4 (using 4.2.4 (KDE 4.2.4), 4.2.4-2.fc10 Fedora) Compiler: gcc OS: Linux (i686) release 2.6.27.25-170.2.72.fc10.i686 Somehow KMail got interrupted when moving some messages to Trash. Now it has 3 messages in an inbox subfolder that it shows as New and that I cannot delete. I solved the problem by deleting the subfolder and then creating a new subfolder with the same name.
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.